The development of the reproductive system in females is triggered by the hormone(s): aA) Testosterone bB) Estrogen cC) Progesterone dB & C eAll of the above

The development of the reproductive system in females is primarily triggered by the hormones Estrogen and Progesterone. Therefore, the answer is dB) Estrogen and Progesterone.

Here's a step-by-step explanation:

1. At puberty, the hypothalamus starts to release Gonadotropin-releasing hormone (GnRH).
2. GnRH stimulates the pituitary gland to produce Follicle-stimulating hormone (FSH) and Luteinizing hormone (LH).
3. FSH and LH then stimulate the ovaries to produce the hormones Estrogen and Progesterone.
4. Estrogen is primarily responsible for the development of female secondary sexual characteristics like the growth of breast tissue and the widening of the hips. It also regulates the menstrual cycle and prepares the uterus for pregnancy.
5. Progesterone is mainly involved in maintaining pregnancy. It thickens the lining of the uterus to prepare for the implantation of a fertilized egg. If pregnancy does not occur, progesterone levels drop and menstruation