where it begins?
2006-08-31 23:52:20 · 8 answers · asked by aby 1 in Health ➔ Women's Health
During the menstrual cycle, the sexually mature female body builds up the lining of the uterus with gradually increasing amounts of estrogen, and when this hormone reaches a critical level, estradiol is produced, and shortly thereafterward there is the stimulation of the ovaries with Follicle Stimulating Hormone (FSH), and luteinizing hormone (LH). Follicles begin developing, and within a few days one "matures" into an ovum or egg. The ovary then releases this egg, (or occasionally two, which might result in dizygotic, or fraternal/non-identical, twins) at the time of ovulation. (Identical twins form from a single egg, as a result of the zygote splitting.) The lining of the uterus, the endometrium, peaks shortly there afterward in a synchronised fashion. After ovulation, this lining changes to prepare for potential conception and implantation of the fertilized egg to establish a pregnancy. The hormone progesterone rises after ovulation, and peaks shortly thereafter.
If fertilization and pregnancy do not ensue, the uterus sheds the lining, culminating with menstruation, which marks the low point for estrogen activity. This manifests itself to the outer world in the form of the menses (also menstruum): essentially part of the endometrium and blood products that pass out of the body through the vagina. Although this is commonly referred to as blood, it differs in composition from venous blood. Menstrual cycles are counted from the beginning of menstruation, because this is an outside sign that corresponds closely with the hormonal cycle. Menses, or bleeding and other menstrual signs may end at different points in the new cycle.
2006-08-31 23:56:08 · answer #1 · answered by Ajeesh Kumar 4 · 1⤊ 0⤋
Observe the uterus.... now imagine someone taking hold of it and twisting and twisting and twisting untill all the blood has dripped out and things go back to what is normal for that person.
2006-09-01 06:55:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
it starts when the egg leaves the ovaries and heads down the fallopian tube thats when you either penitrate the egg with sperm (thats how u get pregnant) or it turns into a period ei when the lining of the womb thickens and gets rid of the excess (thats your period)
2006-09-01 09:19:09 · answer #3 · answered by j_squires2001 1 · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Menstruation
2006-09-01 06:56:37 · answer #4 · answered by vander v 1 · 0⤊ 0⤋
when u get hot u bleed
2006-09-01 07:28:11 · answer #5 · answered by sara r 1 · 0⤊ 0⤋
I dont bloody know!
2006-09-01 07:01:42 · answer #6 · answered by Anonymous · 0⤊ 0⤋
ppy perfect i support her
2006-09-01 08:18:50 · answer #7 · answered by anjum k 3 · 0⤊ 0⤋
when u are very horny
2006-09-01 07:04:04 · answer #8 · answered by 185 5 · 0⤊ 0⤋