THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.

Detailed explanation-2: -In the healthy endometrium, progesterone and estrogen signaling coordinate in a tightly regulated, dynamic interplay to drive a normal menstrual cycle and promote an embryo-receptive state to allow implantation during the window of receptivity.

Detailed explanation-3: -Progesterone and estrogen cause the lining of the uterus to thicken more, to prepare for possible fertilization.

Detailed explanation-4: -The placenta produces two steroid hormones – oestrogen and progesterone. Progesterone acts to maintain pregnancy by supporting the lining of the uterus (womb), which provides the environment for the foetus and the placenta to grow.