Comparison of complications associated with induction by misoprostol versus dilation and evacuation for second-trimester abortion

Genetic Appraisal of RAAS-Associated SNPs: REN (rs16853055), AGT (rs3789678) and ACE (rs4305) in Preeclamptic Women Living with HIV Infection

PURPOSE OF REVIEW

The primary goal of this review article was to determine whether the three RAAS-associated SNPs, Renin-rs16853055, AGT-rs3789678 and ACE-rs4305 are genetically linked to the development of hypertension in preeclampsia. The secondary goal was to establish if there was a link between these SNPs and HIV infection.

RECENT FINDINGS

There is a paucity of findings related to the aforementioned SNPs and preeclampsia. There are no recent findings on the rs16853055 renin polymorphism. The rs3789678 angiotensinogen polymorphism correlated significantly with gestational hypertension. The rs4305 ACE polymorphism showed no significant association with the development of pregnancy-induced hypertension. There are conflicting findings when determining the relationship between ethnicity and the predisposition of preeclampsia and hypertension in relation to the discussed RAAS-associated SNPs. To date, the association between RAAS-associated SNPs and preeclamptic women co-morbid with HIV in South Africa has revealed that certain alleles of the AGT gene are more prominent in HIV-infected PE compared to normotensive pregnant HIV-infected women.

Effectiveness and adverse effects of vaginal misoprostol as a single agent for second trimester pregnancy termination: the impact of fetal viability

PURPOSE

To compare the effectiveness of vaginal misoprostol for second-trimester termination between pregnancies with a dead fetus in utero and those with a live fetus and to identify factors associated with the success rate.

METHODS

Singleton pregnancies with live fetuses and dead fetuses, between 14 and 28 weeks of gestation, with an unfavorable cervix, were recruited to have pregnancy termination with intravaginal misoprostol 400 mcg every 6 h.

RESULTS

Misoprostol was highly effective for termination, with a low failure rate of 6.3%. The effectiveness was significantly higher in pregnancies with a dead fetus (log-rank test; p: 0.008), with a median delivery time of 11.2 vs. 16.7 h. Fetal viability, fetal weight or gestational age, and an initial Bishop score were significantly associated with the total amount of misoprostol dosage used for induction. Fetal viability and gestational age/fetal weight were still independent factors after adjustment for other co-factors on multivariate analysis.

CONCLUSION

Vaginal misoprostol is highly effective for second-trimester termination, with significantly higher effectiveness in pregnancies with a dead fetus. Also, the effectiveness is significantly associated with birth weight/gestational age, and initial Bishop score.

Outpatient medical management of later second trimester abortion (18-23.6 weeks) with procedural evacuation backup: A large case series

Objective

Document the clinical outcomes of an outpatient medical management with procedural evacuation backup procedure for abortions between 18 weeks zero days to 23 weeks six days gestation.

Study design

We conducted a retrospective medical records review of adult patients who received mifepristone and repeated misoprostol for second trimester abortion with procedural evacuation backup at an Arizona clinic between October 2017 and November 2021. We extracted patient demographics; pregnancy and medical history; and preoperative, intraoperative, and postoperative data. We assessed abortion outcomes, including procedure timing, mode of completion (medication alone or medications and procedural evacuation), and safety.

Results

All 359 patients had a complete abortion with 63.5% of patients completing with medication alone and 36.5% with procedural evacuation backup. The median time from first dose of misoprostol to fetal expulsion was six hours, among those who completed the abortion with medications alone. Of those who received procedural evacuation as backup, the median time for procedural evacuation was 10 minutes. The vast majority of patients (99.4%) did not have any adverse events. Two safety incidents (0.6%) occurred, a broad right ligament tear and a uterine rupture.

Conclusion

Patients in one outpatient setting safely and effectively received medical management of second trimester abortion with procedural evacuation backup, and two thirds completed with medications alone.

Implications

Outpatient settings may consider medical management of abortion between 18 and 24 weeks with procedural evacuation back-up as a safe, effective, and manageable second trimester abortion option. Additional research is needed on patient experience and satisfaction.

Second-trimester Abortion

In 2019, the US Centers for Disease Control reported that 7% of abortions were performed after 13 weeks of pregnancy, a small proportion of all terminations. However, the need for second-trimester abortions will increase commensurate with restrictions to access nationwide. Second-trimester abortions are performed with medications or through a procedure. Health care practitioners serving persons at risk of pregnancy should understand how abortions are performed and how to deliver evidence-based postabortion care. The purpose of this article is to provide a foundation for caring for individuals before, during, and after second-trimester abortion.

Anesthetic Considerations for Second-Trimester Surgical Abortions

Although most abortion care takes place in the office setting, anesthesiologists are often asked to provide anesthesia for the 1% of abortions that take place later, in the second trimester. Changes in federal and state regulations surrounding abortion services may result in an increase in second-trimester abortions due to barriers to accessing care. The need for interstate travel will reduce access and delay care for everyone, given limited appointment capacity in states that continue to support bodily autonomy. Therefore, anesthesiologists may be increasingly involved in care for these patients. There are multiple, unique anesthetic considerations to provide safe and compassionate care to patients undergoing second-trimester abortion. First, a multiday cervical preparation involving cervical osmotic dilators and pharmacologic agents results in a time-sensitive, nonelective procedure, which should not be delayed or canceled due to risk of fetal expulsion in the preoperative area. In addition, a growing body of literature suggests that the older anesthesia dogma that all pregnant patients require rapid-sequence induction and an endotracheal tube can be abandoned, and that deep sedation without intubation is safe and often preferable for this patient population through 24 weeks of gestation. Finally, concomitant substance use disorders, preoperative pain from cervical preparation, and intraoperative management of uterine atony in a uterus that does not yet have mature oxytocin receptors require additional consideration.

Rates of complication for dilation and evacuation versus induction of labor in treatment of second trimester intrauterine fetal demise

OBJECTIVE

To evaluate clinical differences in the safety of dilation and evacuation (D&E) and induction of labor (IOL) for the treatment of intrauterine fetal demise (IUFD) between 14 and 24 weeks gestation.

STUDY DESIGNS

A retrospective chart review was conducted at a single institution comparing rates of major and minor complications between patients who undergo D&E and those that undergo IOL in the treatment of IUFD between 14 and 24 weeks gestation. Demographic and medical variables were stratified by management method and analyzed using chi-squared and t-tests where appropriate.

RESULTS

Patients who underwent IOL were of a more advanced gestational age and more likely to be uninsured. Patients who underwent D&E were more likely to be privately insured. Hospital time for an IOL was significantly longer than for D&E. Composite rates of complication did not differ significantly between management groups. Patients treated with D&E were more likely to require uterine aspiration.

CONCLUSIONS

D&E and IOL are equally safe methods for the management of IUFD between 14 and 24 weeks gestation. Both options should be made available to patients who experience this rare pregnancy outcome.

Introducing the Dilation and Evacuation Technique in Brazil: Lessons Learned From an International Partnership to Expand Options for Brazilian Women and Girls

Dilation and evacuation (D&E) is the recommended surgical procedure for uterine evacuation in the second trimester. Despite its established safety record, it is not routinely available in most countries around the world. In this paper, we describe the multi-phase capacity-building project we undertook to introduce D&E in Brazil. First, we invited a highly motivated obstetrician-gynecologist and abortion provider to complete an observership at an established D&E site in the United States. We then organized a month-long clinical training for two experienced gynecologists in Brazil, followed by ongoing remote mentorship. Almost all patients we approached during the training opted for D&E, and all expressed satisfaction with their experience. Despite the restrictive legal setting and prevailing abortion stigma in Brazil, our training was well-received, and we did not experience any overt resistance from hospital staff. We learned that obtaining institutional support is essential; and that presenting scientific evidence during dedicated didactic times was an important strategy to obtain buy-in from other local healthcare providers. An important challenge we encountered was low case volume given the restrictive legal setting. We addressed this by partnering with nearby hospitals and non-profit organizations for patient referrals. We also rescheduled, adapted and optimized this project for implementation in the midst of the COVID-19 pandemic. Despite the challenges we faced, this project led to the successful introduction of D&E up to 16–18 weeks at two sites in Brazil. In the future, we plan additional training to increase capacity for D&E at more advanced gestational ages.

A single-blinded randomized controlled trial evaluating pain and opioid use after dilator placement for second-trimester abortion

OBJECTIVES

To compare pain levels and medication needs after placement of laminaria vs Dilapan-S, and after dilation and evacuation (D&E).

STUDY DESIGN

We conducted a single-blinded randomized control trial of patients undergoing D&E at 15 0/7 to 23 6/7 weeks gestation, randomizing to cervical preparation with laminaria or Dilapan-S. We compared pain levels and medication usage following dilator placement (5 minutes; 2, 4, and 8 hours; the following morning) and D&E (1, 4, 24, and 48 hours). Our primary outcome was median change from baseline pain, and secondary outcomes included maximum pain timing and overall narcotic use. We compared baseline characteristics, median pain increases and quantities of narcotics used.

RESULTS

We analyzed 67 participants with laminaria (n = 34) and Dilapan-S (n = 33). More Dilapan-S users had a prior vaginal delivery (n = 20, 60.6%) than laminaria users (n = 11, 32.4%), p = 0.02. Maximum median pain was not statistically different (Laminaria: +3.5 (interquartile range [IQR] +0.5, +6.5); Dilapan-S: +3 (IQR +1, +5); p = 0.42. Thirty-seven (63.8%) participants reported higher levels of pain following dilator placement than D&E. Overall, 26 (42.6%) participants used narcotics during their abortion episode, with no difference in median number of tablets between laminaria (2, range 1-8) and Dilapan-S (4.5, range 1-15) participants (p = 0.34).

CONCLUSIONS

Median pain increase did not differ in participants receiving laminaria or Dilapan-S for cervical preparation prior to D&E. The majority of patients will use a small amount of narcotics if available.

IMPLICATIONS

The lack of difference in pain between laminaria and Dilapan-S enhances the applicability of pain intervention research across dilator types. With over half of participants using a small amount of narcotics during their D&E episode, pain management should be individualized to patient needs.

Evaluation of shorter mifepristone to misoprostol intervals for second trimester medical abortion: a retrospective cohort study

OBJECTIVES

To assess shorter mifepristone-misoprostol intervals compared to current guidelines for second trimester medical abortion on total abortion time (mifepristone to fetal expulsion) and induction time (first misoprostol to fetal expulsion).

METHODS

This retrospective cohort study included women who elected for a second trimester medical abortion with mifepristone and misoprostol at an academic tertiary medical center in the United States from January 2008 to June 2018. We abstracted times of mifepristone administration, first dose of misoprostol, and fetal expulsion from the medical record. We assessed outcomes based on the shorter intervals <12 h and 12 to 24 h compared to the guideline mifepristone-misoprostol interval (24-48 h).

RESULTS

The study population included eighty-nine women, 47, 28, and 14 women in the <12 h, 12 24 h, guideline (24-48 h) groups, respectively. The cohort had a median gestational age of 22^0/7 weeks (range: 15^0/7-27^0/7) and parity of 1 (range: 0-5) with no differences observed between groups. Total abortion times were 20.7 h (range: 3.7-46.9), 30.6 h (16.7-48.0), and 42.8 h (32.7-62.6), respectively (p < 0.001). Induction times were 12.9 h (range: 1.2-36.6), 11.7 h (2.0-35.2), and 9.3 h (5.3-16.5), respectively. Fetal expulsion within 12 h of first misoprostol dose occurred in 22 (47%), 14 (50%), and 9 (64%), respectively (p = 0.52).

CONCLUSIONS

Shorter mifepristone-misoprostol intervals (less than 24 h) significantly decrease the total abortion time while maintaining a clinically similar induction time.

IMPLICATIONS

Shortening the mifepristone-misoprostol interval in second trimester medical abortion significantly decreases the total abortion time which may be preferable to some women or health systems.

Overexpression of lncRNA EPB41L4A-AS1 Induces Metabolic Reprogramming in Trophoblast Cells and Placenta Tissue of Miscarriage

Long non-coding RNAs (lncRNAs) have been shown to be crucial regulators in numerous human diseases. However, little is known about their effects on early recurrent miscarriage (RM). Here we aimed to investigate the role of lncRNA EPB41L4A-AS1 on placental trophoblast cell metabolic reprogramming, which might be involved in the pathogenesis of RM. After microarray and GEO database analyses, we found that EPB41L4A-AS1 was significantly increased in early RM placental tissue, and this increase may relate to estradiol-mediated upregulation of PGC-1α. EPB41L4A-AS1 overexpression inhibits glycolysis but increases the dependence on fatty acid oxidation in mitochondrion metabolism and suppresses the Warburg effect, which is necessary for rapid growth of the placental villus, leading to miscarriage. Mechanistic analyses demonstrated that EPB41L4A-AS1 functions as a lncRNA in the regulation of VDAC1 and HIF-1α expression through enhancement of H3K4me3 levels in the promoters of VDAC1 and HIF1A-AS1, a natural antisense transcript (NAT) lncRNA of HIF-1α. Taken together, these findings demonstrate that aberrant expression of EPB41L4A-AS1 is involved in the etiology of early RM, and it may be a candidate diagnostic hallmark and a potential therapeutic target for early RM treatment.

Current and potential methods for second trimester abortion

Medical and surgical methods can both be recommended for second trimester abortion (after 12-weeks of gestational age). Induced abortion with a mifepristone and misoprostol regimen is the preferred approach; where mifepristone is not available, misoprostol alone for medical abortion is also effective. Dilation and evacuation (D&E) is the procedure of choice for surgical abortions, and adequate cervical preparation contributes significantly to safety. Availability of drugs and instruments, ability to provide pain control, provider skill and comfort, client preference, cultural considerations, and local legislation all influence the method of abortion likely to be performed in a given setting. Both surgical and modern medical methods are safe and effective when provided by a trained, experienced provider.