Minkoff H, Grunebaum A, McCormack W M, Schwarz R H
Obstet Gynecol. 1985 Aug;66(2):239-40.
The relative viability of X-bearing and Y-bearing spermatozoa is influenced by factors in the vagina such as pH. The vaginal environment, in turn, is influenced by its flora. This study examined the relationship of the vaginal flora to the sex of conceptuses. It was found that women who carried Trichomonas vaginalis or Bacteroides sp or who had nonspecific vaginitis at first prenatal visit were significantly more likely to deliver females than women who carried none of these organisms (54 versus 37%, P less than .02).
携带X染色体和Y染色体的精子的相对活力受阴道内因素如pH值的影响。反过来，阴道环境又受其微生物群落的影响。本研究探讨了阴道微生物群落与胎儿性别的关系。结果发现，首次产前检查时携带阴道毛滴虫或拟杆菌属或患有非特异性阴道炎的女性比未携带这些微生物的女性生女孩的可能性显著更高（54%对37%，P<0.02）。
