write down the events occuring in uterus and vagina after ovulation?
Answers
8 days past ovulation? Some people don't suspect they're pregnant until they miss their period. ...
Implantation bleeding. ...
Dizziness and headaches. ...
Tender, swollen breasts. ...
Constipation or gas. ...
Morning sickness. ...
Increased urination. ...
Unusual tastes, smells, and cravings.
Every 28 days or so, one mature egg is released from the ovary. This is called ovulation. After the egg is released, it moves into the fallopian tube where it stays for about 24 hours. If the egg is not fertilized during that time, the egg disintegrates (breaks down) and menstruation (your period) begins 2 weeks later.
During each menstrual cycle, a cycle of events occurs simultaneously in both the uterus and ovary termed the ‘uterine cycle’ and the ‘ovarian cycle’ respectively. During the ‘uterine cycle’ the endometrium, (lining of the womb) is prepared for a possible pregnancy. During the ‘ovarian cycle’ an immature ovum, (egg, primordial follicle) develops in the ovary and when it is mature it is released into the outer end of the fallopian tube at ovulation. Before ovulation the developing follicle secretes oestrogen. After ovulation the corpus luteum in the ovary secretes progesterone to maintain a possible pregnancy.
During the menstrual cycle changes also occur in the uterine cervix , i.e. the cells in the lining of the cervix secrete mucus, and the cervical os may be open or closed depending on whether the phase of the cycle is fertile or infertile. The woman can observe these events during the cycle as the hormones oestrogen and progesterone cause changes in the fertility indicators, (i.e. changes in cervical mucus, in basal body temperature and in the cervix itself) which allow her to identify when she is infertile or potentially fertile (fertility awareness).
Changes in the endometrium during the cycle, (uterine cycle):
These cyclical changes in the endometrium can be divided into three phases:
(i) menstrual phase
(ii) proliferative phase
(iii) secretory phasei)
(i)Menstrual phase:
During the menstrual phase the superficial layer of the endometrium is discharged and this is called menstruation. Menstruation is the vaginal bleeding that occurs at the end of an ovulatory cycle when pregnancy has not occurred. Progesterone maintains the integrity of the endometrium and when pregnancy does not occur the progesterone level falls causing the endometrium to be shed as the menstrual period. The menstrual bleeding lasts from 3-5 days. The first day of the menstrual cycle is the first day of the period, and the last day of the menstrual cycle is the day before the next period.
(ii) Proliferative phase:
In the proliferative phase the endometrial cells in the uterus proliferate in preparation for a possible pregnancy. This growth is stimulated by oestrogen from the growing follicle (ovum, egg) in the ovary before ovulation causing the thickness of the endometrium to increase 3-5 fold.1 The proliferative phase of the endometrium corresponds to the follicular phase of the ovarian cycle, i.e. when the follicle (ovum, egg) is developing in the ovary.
(iii) Secretory phase:
The secretory phase of the endometrium occurs after ovulation. In this phase the cells in the endometrium become more complex in preparation for implantation of the embryo. This is due to stimulation from progesterone which is secreted by the corpus luteum in the ovary. The secretory phase of the endometrium corresponds to the luteal phase of the ovarian cycle, when the corpus luteum is functioning in the ovary.