Influence Factors of Sexual Intercourse Frequency in Infertile Couples without Sexual Dysfunction in Southwest China: A Retrospective Study

INTRODUCTION

The aim of this study was to investigate the sexual intercourse frequency (SIF) of infertile couples without sexual dysfunction and analyze its related influencing factors.

MATERIALS AND METHODS

We retrospectively analyzed the data of a total number of 4,923 infertile couples without sexual dysfunction who received treatment in our assisted reproductive center from October 2016 to October 2018. Both partners of couples were inquired about their information of demographic statistics, occupations, lifestyles, education backgrounds, psychological characteristics, and testostrone levels of male patients. The multivariable linear regression analysis was applied to evaluate the influence of various variables on SIF.

RESULTS

The median (interquartile range) SIF of infertile couples without sexual dysfunction was 7 (6.5-8) times per month. Lower academic qualification and younger age were predictive of increased SIF in both partners. The SIF of Chinese Han women and Chinese Zang women is higher than that of other ethnic groups. Men with lower testosterone (<10 nmol/L) were associated with lower SIF. The BMI, occupation, alcohol consumption, races of both partners of couples, and smoking status of males were not associated with SIF. Multivariable linear regression analysis indicated that only the age and the education level of men played an important role in SIF, and educational level of men had the greatest impact, followed by men's age.

CONCLUSION

In our study, we analyzed demographics data, occupational characteristics, and lifestyle behaviors of both partners, as well as men's testosterone levels; we also reported the related SIF. According to our research, men's education level was the most important factor in predicting SIF, followed by men's age. Testosterone levels of men do not appear to play a substantial role in predicting SIF in infertile couples.

Predictors of Sexual Intercourse Frequency Among Couples Trying to Conceive

BACKGROUND

Little is known about the predictors of sexual intercourse frequency (SIF) among couples trying to conceive despite the well-established link between SIF and fecundity.

AIM

To evaluate men's and women's demographic, occupational, and lifestyle predictors of SIF among couples.

METHODS

469 Couples without a history of infertility participating in the Longitudinal Investigation of Fertility and the Environment Study (2005-2009) were followed up for ≤1 year while trying to conceive. At enrollment, both partners were interviewed about demographic, occupational, lifestyle, and psychological characteristics using standardized questionnaires. Multivariable generalized linear mixed models with Poisson distribution were used to estimate the adjusted percent difference in SIF across exposure categories.

OUTCOMES

SIF was recorded in daily journals and summarized as average SIF/mo.

RESULTS

The median (interquartile range) SIF during follow-up was 6 (4-9) acts/mo. For every year increase in age for women and men, SIF decreased by -0.8% (95% CI -2.5 to 1.0%) and -1.7% (95% CI -3.1 to -0.3%). Women with high school education or less and those of non-white race had 34.4% and 16.0% higher SIF, respectively. A similar trend was seen for men's education and race. Only couples where both partners (but not just 1 partner) worked rotating shifts had -39.1% (95% CI -61.0 to -5.0%) lower SIF compared to couples where neither partner worked rotating shifts. Men's (but not women's) exercise was associated with 13.2% (95% CI 1.7-26.0%) higher SIF. Diagnosis of a mood or anxiety disorder in men (but not women) was associated with a 26.0% (95% CI -42.7 to -4.4%) lower SIF. Household income, smoking status, body mass index, night work, alcohol intake, and psychosocial stress were not associated with SIF.

CLINICAL TRANSLATION

Even among couples trying to conceive, there was substantial variation in SIF. Both partners' age, education, race, and rotating shift work as well as men's exercise and mental health play an important role in determining SIF.

CONCLUSIONS

As this was a secondary analysis of an existing study, we lacked information on many pertinent psychological and relationship quality variables and the hormonal status of participants, which could have affected SIF. The unique population-based couple design, however, captured both partners' demographics, occupational characteristics, and lifestyle behaviors in advance of their daily, prospective reporting of SIF, which was a major strength. Important predictors of SIF among couples attempting to conceive include men's exercise and mental health and both partners' age, education, race, and rotating shift work. Gaskins AJ, Sundaram R, Buck Louis GM, et al. Predictors of Sexual Intercourse Frequency Among Couples Trying to Conceive. J Sex Med 2018;15:519-528.

Passion, Intimacy, and Time: Passionate Love as a Function of Change in Intimacy

To build on existing theories about love, we propose that passion is a function of change in intimacy (i.e., the first derivative of intimacy overtime). Hence, passion will be low when intimacy is stable (either high or low), but rising intimacy will create a strong sense of passion. This view is able to account for a broad range of evidence, including frequency of sex in long-term relationships, intimate and sexual behavior of extraverts, gender differences in intimate behavior, gain and loss effects of communicated attraction, the biologically atypical human preference for face-to-face coitus, and patterns of distress in romantic breakups. Although this view may provide a good fit to available evidence, the totality of evidence is not yet adequate for a definitive conclusion, and suggestions for further research are offered.

Role of Partner Novelty in Sexual Functioning: A Review

This review investigates whether sexual desire and arousal decline in response to partner familiarity, increase in response to partner novelty, and show differential responding in men and women. These questions were considered through the perspective of two leading evolutionary theories regarding human mating strategies: sexual strategies theory and attachment fertility theory. The hypotheses emerging from these theories were evaluated through a critical analysis of several areas of research including habituation of arousal to erotic stimuli, preferences regarding number of sexual partners, the effect of long-term monogamous relationships on sexual arousal and desire, and prevalence and risk factors associated with extradyadic behavior. The current literature best supports the predictions made by sexual strategies theory in that sexual functioning has evolved to promote short-term mating. Sexual arousal and desire appear to decrease in response to partner familiarity and increase in response to partner novelty in men and women. Evidence to date suggests this effect may be greater in men.

A study of sexual satisfaction and frequency of sex among Hong Kong Chinese couples

There have been several studies in Western societies on the causes and consequences of sexual satisfaction within marriage. Little is known, however about the marital sexual relationship in Chinese societies. Moreover, most published studies used married individuals rather than married couples as participants. The present study examined data from a well-established knowledge, attitude, and practice (KAP) survey of 1,124 Hong Kong Chinese couples on martial sexual relationship. A conceptual model was tested using structural equation modeling (SEM). Interest in sex was found to be the strongest predictor of both sexual satisfaction and frequency of sex for both husbands and wives. Among the sociodemographic variables, the following two were significantly associated with lower frequencies of sex: for wives, that of having a full-time job; and for husbands, the factor of age. Theoretical implications for research on the interplay among culture, marriage, and sex in non-Western societies are discussed.

Psychology of the scientist: LXXXIII. An assessment of Herek's critique of the Cameron group's survey studies

Herek's criticisms of the research on sexuality by Paul Cameron's research group are evaluated. While the Cameron group's research has many limitations, these limitations are not uncommon in contemporary research, especially research that concerns specialized, hard-to-find populations. The best response from a scientific perspective, it is argued, is better research, not merely critical comments on existing research.

Coital frequency among married and cohabiting couples in the United States

Coital frequency is studied among couples as a function of marital or cohabiting status, relationship duration, number of children, religious affiliation, income, education, fertility intentions, age, race, self-assessed health, time spent in work, and perceived relationship quality. Data are from the 1987-88 National Survey of Families and Households. Predictors of coital frequency that were stable across several analyses were male's and female's ages, the duration of the relationship, and the male partner's self-assessed health. When the discrepancy in partners' reports was adjusted, cohabitation status, number of children, future fertility intentions, religious affiliation, and relationship quality as assessed by the female partner were significant. The results suggest a substantial idiosyncratic component to the determination of coital frequency in relationships.

Sexual satisfaction among Korean-American couples in the Midwestern United States

One hundred couples composed of American husbands and Korean wives from the midwestern United States were surveyed with respect to sexual satisfaction. Though the responses of spouses were correlated highly, husbands were more satisfied with the quality of the sexual relationship than were wives. As found previously with more general populations, self-esteem and higher levels of positive regard, communication, and cohesion were related to higher sexual satisfaction for both husbands and wives. For wives, higher socioeconomic status and younger age were related to higher sexual satisfaction, as was the husband's being a current or retired member of the US military. Cultural factors were also important; conflicts over sexual practices related to cultural differences, though limited to about 10% of the subjects, were related to sexual satisfaction for both husbands and wives. Wives' English proficiency was related slightly to sexual satisfaction, but not husbands' proficiency in Korean. For husbands only, marital conflict over cultural differences and rejection by relatives and friends were related negatively to sexual satisfaction. Clinical implications of the results are discussed.