Assertion: thyroid stimulating hormone | /r/HasProperty | evident
Facets:
value: by 12 weeks of gestation
type: TEMPORAL
Source sentences:
text: Thyrotropin-releasing hormone (TRH) is released from hypothalamus by 6 – 8 weeks, and thyroid-stimulating hormone (TSH) secretion from fetal pituitary is evident by 12 weeks of gestation, and fetal production of thyroxine (T 4 ) reaches a clinically significant level at 18–20 weeks.