Master in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783. During pregnancy placenta secretes human chorionic gonadotropic hormone that has the same property as LH. This hormone stimulates the interstitial cells of fetal testis and produces testosterone which promotes formation of male sexual organs. No testosterone is produced during childhood until the age of 10 to 13 years and lasts throughout life.