NEET BIOLOGY

Detailed explanation-1: -If fertilization does not occur, the endometrium, coupled with blood and mucus from the vagina and cervix (the lower, narrow part of the uterus located between the bladder and the rectum) make up the menstrual flow (also called menses) that leaves the body through the vagina.

Detailed explanation-2: -If one egg is fertilised by two sperm, it results in three sets of chromosomes, rather than the standard two-one from the mother and two from the father. And, according to researchers, three sets of chromosomes are “typically incompatible with life and embryos do not usually survive".

Detailed explanation-3: -If the ovum gets fertilized, the zygote gets implanted. However, if fertilization does not occur, the egg withers away and the thick cell lining of the uterus gets removed and discharges the contents through the birth canal. This process is referred to as menstruation.

Detailed explanation-4: -Ovulation basics If the egg is not fertilized, the lining of the uterus, which has thickened to prepare for fertilization, will be shed through menstruation.

Detailed explanation-5: -Having a lack of periods (amenorrhea): Missing one or more periods without being pregnant could be a sign of anovulation. Having a lack of cervical mucus: Right before and during ovulation, you usually have the most vaginal discharge called cervical mucus. It usually looks like raw egg whites.