How menstrual cycle works for pregnancy?
Estrogen level starts building up in the beginning of a menstrual cycle. Due to this, the walls or lining in the uterus thickens for the preparation of a fertilized egg. In a menstrual cycle, 14 days are important where estrogen hormones level goes up very high and an egg is released from the ovaries. Once the egg is released, the progesterone hormone level also rises lasting for 7 days. These are very crucial days because endometrium does also rise for conception. Woman becomes very fertile in these days. In case conception does not happen, the level of estrogen and progesterone start declining and drop to the lowest level. Once the level drops, the lining of uterus begin to shed finally resulting into menstruation. How birth control pills work? Birth control pills suppress ovulation, which completely stops ovaries releasing eggs for fertilization by sperm. Most pills are made of two hormones called estrogen and progestin, which help in preventing pregnancy in great ways. Disadvantage
