Mention the importance of $LH$ surge during menstrual cycle.
Due to more secretion of $\mathrm{LH}$ in the middle of menstrual cycle, Graafian follicle breaks and due to that ovum is released at this time remaining parts of graafian follicle are transformed into corpus leuteum. Corpus leuteum secretes more amount of projesterone which is necessary for maintenance of endometrium. For implantation of such endometrium fertilized ovum and remaining processes of conceiving.
The following graph of relative concentrations of the four hormones present in the blood plasma of a woman during her menstrual cycle. Identify the hormones.
The structure formed after release of ova from graafian follicles and secretory in nature, is
Assertion : Corpus luteum degenerates in the absence of fertilization.
Reason : Progesterone level decreases.
The placenta helps in the maintenance of pregnancy by secreting a hormone, known as