Answer:
Uterus
Reason:
Also commonly called a womb, a uterus looks a bit like an upside down pear, and it’s about the same size. It’s low down, in the middle of your pelvis, above and behind your bladder. What does the uterus do? As oestrogen increases every month, the lining of the uterus thickens, to get ready to nourish the fertilised egg.
