Question:
Mention the source and the functions of the following hormones :
hCG; LH; FSH; Relaxin.
Mention the source and the functions of the following hormones :
hCG; LH; FSH; Relaxin.
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Give one source and one function each: hCG from placenta, LH and FSH from anterior pituitary, relaxin from ovary and placenta.
Updated On: Oct 22, 2026
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Solution and Explanation
Step 1: hCG (human chorionic gonadotropin):
Source: the placenta (trophoblast cells of the chorion).
Function: it stimulates the corpus luteum to keep producing progesterone, so the uterine lining is maintained in early pregnancy.
Step 2: LH (luteinising hormone):
Source: the anterior pituitary gland.
Function: a surge of LH causes ovulation and turns the empty follicle into the corpus luteum.
Step 3: FSH (follicle stimulating hormone):
Source: the anterior pituitary gland.
Function: it stimulates growth of ovarian follicles and the secretion of oestrogen by them.
Step 4: Relaxin:
Source: the ovary (corpus luteum) and the placenta.
Function: it softens the pubic symphysis and relaxes the pelvic ligaments and cervix, which eases delivery.
Final Answer:
hCG - placenta, maintains the corpus luteum. LH - anterior pituitary, ovulation. FSH - anterior pituitary, follicle growth. Relaxin - ovary and placenta, relaxes pelvic ligaments for birth.
Source: the placenta (trophoblast cells of the chorion).
Function: it stimulates the corpus luteum to keep producing progesterone, so the uterine lining is maintained in early pregnancy.
Step 2: LH (luteinising hormone):
Source: the anterior pituitary gland.
Function: a surge of LH causes ovulation and turns the empty follicle into the corpus luteum.
Step 3: FSH (follicle stimulating hormone):
Source: the anterior pituitary gland.
Function: it stimulates growth of ovarian follicles and the secretion of oestrogen by them.
Step 4: Relaxin:
Source: the ovary (corpus luteum) and the placenta.
Function: it softens the pubic symphysis and relaxes the pelvic ligaments and cervix, which eases delivery.
Final Answer:
hCG - placenta, maintains the corpus luteum. LH - anterior pituitary, ovulation. FSH - anterior pituitary, follicle growth. Relaxin - ovary and placenta, relaxes pelvic ligaments for birth.
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