Follicular phase.
The primary follicles in the ovary grow and become a fully mature Graafian follicle.
The endometrium of the uterus is regenerated by proliferation of the cells.
These changes are due to an increased level of pituitary hormones,FSH and LH and ovarian hormone,estrogen.
FSH controls the follicular phasa; it stimulates the growth of follicles and secretion of estrogen by the follicular cells.
Both FSH and LH reach their peak level in the middle of the cycle.

In males,gametogenesis is completed in the testes.
In females,it is completed in the ovary and fallopian tube.

LH-surge refers to a very high (maximum) level of LH during the middle of menstrual cycle.
It occurs around the 14th day of mentrual cycle,just before ovulation.

Each fallopian tube extends from the periphery of each ovary to the uterus.
The part of the fallopian tube closer to the ovary is the funnel-shaped infundibulum.
The edges of the infundibulum possess finger like projections,called fimbriae.
The infundibulum leads to the wider part of the fallopian tube,called ampulla.
The last part of the oviduct with a narrow lumen;is called isthmus;it joins the uterus.

Duct System of male Reproductive System.
The intratesticular duct system starts with tubuli recti,which are the short,straight end segments of the seminiferous tubules ;these tubules connect the seminiferous tubules to the cuboidal epithelium-lined channels,called rete testis.
Form the rete testis arise 10-20 fine tubules,called vasa efferentia that leave the testis and open into the epididymis.
Epididymis is a single convoluted tubule that is located along the posterior surface of the testis.
The epididymis continues as the vas-deferens,that ascends into the abdominal cavity through inguinal canal.
It loops over the urinary bladder and receives a duct from the seminal vesicle of its side to form ejaculatory duct that runs through the prostate and opens into the prostatic urethra,just after its emergence from the urinary bladder.
The urethra receives the ducts of prostate gland and bulbourethral glands,a little ahead and runs through the penis to its openning called urethral meatus,to the outside.

The target cells for luteinising hormone in males are the Leydig cells and in females are the mature follicles.

LH in males stimulates the Leydig cells of testes to secrete androgens (testosterone) which controls spermatogenesis.

LH in females stimulates ovulation formation of corpus luteumfrom the reptured follicle and secretion of progesterone by corpus luteum.

The menstrual phase (menstruation) is followed by follicular or proliferative phase;it is under the influence of follicle stimulating hormone (FSH) from the anterior pituitary. The primary follicle matures into Graafian follicle;the follicular cells secrete estrogens,which control the growth and maintenence of the secondary sex organs like uterus,fallopian tube,ect. The FSH and lutenising hormone reach their peak level around the 14th day of menstrual cycle. The peak level of LH or LH surge causes the rupture of Graafian follicle and release of ovum;this process is called ovulation. It is followed by luteal phase,where LH influences the ruptured Graafian follicle to transform into corpus luteum. Corpus luteum secretes large quantity of progesterone in the luteal phase,which is necessary for the growth and maintenance of endometrium of uterus for implantation. If fertilisation does not occur,corpus luteum degenerates and progesterone is not secreted. The endometrium degenerates and menstruation occurs.

(a) False
Androgens are formed by Leydig cells.
(b) True.
(c) False
Oogenesis takes place in the ovarian follicles.
(d) True
(e) False
Oogenesis occurs in the female embryo before birth but does not complete until puberty.
(f) True.
(g) True.