Soma H, Takayama M, Kiyokawa T, Akaeda T, Tokoro K
Obstet Gynecol. 1975 Sep;46(3):311-2.
Plasma gonadotropin levels throughout the regular menstrual cycle in 10 Japanese women were measured daily using radioimmunoassay. At the peak of ovulation, mean FSH levels were 17.6 +/- 7.9 mlU/ml and mean LH levels were 75.2 +/- 26.0 mlU/ml. At midcycle, the mean gonadotropin levels were significantly lower in Japanese women than in Nigerian women who, as reported by Nylander (1973), had a high frequency of twinning. It is, therefore, suggested that the low frequency of dizygotic twinning in Japanese women might be related to their low output of gonadotropin.
采用放射免疫分析法，对10名日本女性整个正常月经周期中的血浆促性腺激素水平进行每日测量。在排卵高峰期，促卵泡激素（FSH）平均水平为17.6±7.9毫国际单位/毫升，促黄体生成素（LH）平均水平为75.2±26.0毫国际单位/毫升。在月经周期中期，日本女性的促性腺激素平均水平显著低于尼日利亚女性。据尼兰德（1973年）报道，尼日利亚女性双胎妊娠的发生率较高。因此，有人认为日本女性双卵双胎发生率较低可能与其促性腺激素分泌量低有关。
