In a foetus, thyroxine secretion begins by?
3rd month
8th week
10th to 12th weeks
9th month
Thyroxine secretion begins by 10th to 12th weeks. Glucagon secretion begins by 8th week. Insulin containing granules can be identified in the human foetal pancreas by 9 to 10 weeks. and insulin in foetal plasma is detectable at 12 weeks. Ref: Williams Obstetrics, 22/e, Page 108 ; Dutta Obstetrics 6/e, Page 43