Question

from where does the testosterone comes from during 7th month of pregnancy for descendens of testes into scrotum if synthesis of testosterone starts during pregnancy​

Answer 1

Answer:

it is actually sex determining region Y (SRY) Gene producing Testis-determining factor (TDF)

Explanation:

Testicular descent results from hormonal and mechanical influences that mediate migration through the abdominal wall and the inguinal canal to the scrotum. The process of descent begins between weeks 8 to 15 of gestation, accelerating from weeks 24 to 26.(approx. 7th MONTH).

PROCESS...→→

Testis-determining factor (TDF), also known as sex-determining region Y (SRY) protein, is a DNA-binding protein (also known as gene-regulatory protein/transcription factor) encoded by the SRY gene that is responsible for the initiation of male sex determination in therian mammals (placental mammals and marsupials). SRY is an intronless sex-determining gene on the Y chromosome.

During gestation, the cells of the primordial gonad that lie along the urogenital ridge are in a bipotential state, meaning they possess the ability to become either male cells (Sertoli and Leydig cells) or female cells (follicle cells and Theca cells). TDF initiates testis differentiation by activating male-specific transcription factors that allow these bipotential cells to differentiate and proliferate.