XO/XY mosaicism with non fluorescent Y chromosome: clinical, cytogenetic and endocrinological studies on a female subject

Cytogenetic, clinical and endocrinological studies were performed on a phenotypically female subject who had a XO/XY mosaicism. This patient had a primary amenorrhea. A disgenic testis on the left side and a primordial ovary on the right one was showed by laparotomy performed in this subject in the prepubertal age. The Y chromosome had not any fluorescence and was shorter than normal one. The basal plasma levels of various hormones and the hypothalamic-pituitary stimulation tests were similar to other subjects with gonadal disgenesis. However a low response of growth hormone to insulin tolerance test, showed in this case, suggest the necessity to early supply a sufficient replacement of therapy.

Inhibitory effect of prostaglandin F2alpha (PgF2alpha) on puerperal lactation

Twenty puerperal women in 4th day after delivery were treated with a saline infusion containing 10 mg of PgF2alpha. Milk secretion, breast engorgement, prolactin plasma levels and side effects were determined. In all patients lactation disappeared within 48 hours after PgF2alpha infusion. During the following 12 hours after PgF2alpha treatment the prolactin plasma levels showed an important and significant decrease in all cases. In the following days the prolactin plasma levels decreased such as in normal puerperium. In some cases low gastralgia and in one case diarrhoea compaired. These results can be explained by PgF2alpha double action either on pituitary-hypothalamic function or on mammary gland cells.