@Diogenes
Embryonic Development and Initial Female Characteristics
Genetic Basis of Initial Female Development
Research indicates that all human embryos, regardless of their eventual sex, initially develop with female characteristics. This phenomenon is not unique to humans but is observed across all mammalian embryos. During the early stages of development, specifically the first two months, embryos possess a combined clitoral-penile tubercle, which is a precursor to both male and female genitalia
1. Geneticists have found that in the absence of male-specific hormones, embryos will continue to develop female characteristics
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Role of Androgens in Male Differentiation
The differentiation into male characteristics occurs around the second month of pregnancy when the fetal testes begin to produce androgens. These male hormones counteract the maternal estrogens, leading to the development of male genitalia and other male-specific traits
1. Without this androgen surge, the embryo continues to develop as female, which supports the idea that the default developmental pathway is female
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These studies suggest all human embryos start life as females.
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