The orvarian stroma is divided into two zones -a peripheral `ul((A))` and an inner `ul((B))`.

The blastomeres in the blastocyst are arranged into an outer layer called ul((A)) and an inner group of cells attached to trophoblast called ul((B)) .

The first menstruation beings at ul((A)) and is called ul((B)) .

The first menstruation beings at ul((A)) and is called ul((B)) .

Ovaries produce the ul((A)) and several ul((B)) hormones.

Ovaries produce the ul((A)) and several ul((B)) hormones.

During follicular phase changes in the ovary and the uterus are induced by chages in the levels of ul((A)) and ul((B)) hormones.

During follicular phase changes in the ovary and the uterus are induced by chages in the levels of ul((A)) and ul((B)) hormones.

LH acts as the ul((A)) cells and stimulates synthesis of ul((B)) .

LH acts as the ul((A)) cells and stimulates synthesis of ul((B)) .

After completion of second meiotic division of the secondary oocyte and result in the formation of a ul((A)) and a haploid ul((B)) .