What hormones are unique to pregnancy?

hCG, hPL, relaxin

The correct answer is Option (1) -  hCG, hPL, relaxin

These hormones are unique to pregnancy and play vital roles in supporting it:

hCG (human chorionic gonadotropin): Produced by the placenta.It maintains the corpus luteum in early pregnancy.Used in pregnancy tests.

hPL (human placental lactogen): Also Produced by the placenta. It supports fetal growth and prepares the mother's body for lactation.

Relaxin: Produced by the ovary and placenta. It relaxes pelvic ligaments and softens the cervix for childbirth.

 The other options:

• Estrogen, progesterone: Important in pregnancy but not unique to it — they’re also part of the regular menstrual cycle.
• FSH, LH: Regulate ovulation and are actually suppressed during pregnancy.
• Insulin, glucagon: Metabolic hormones — nothing to do with pregnancy specifically.