Development of gonadal sex
After fertilization and during 5th week of embryogenesis, germ cells
- originate in the gut
- migrate to gonadal ridges
Fetal testis
- differentiates during week 7
- begins to secrete testosterone during week 8
- testosterone influences phenotype
Fetal ovary forms follicles
- 15 of gestation
- estrogen secreted from w10
- no effect on phenotype