In many cases amenorrhea does not occur. There are many reasons why this could happen. Maybe the body is used to the conditions in which a normal body does not adapt. For example, someone is at an extremely low weight but they have been at the weight for a long time so they get their period. Also people have different weights where they experience amenorrhea. Someone may have lost weight, but not enough to have amenorrhea but enough to get into the range classified as an eating disorder criteria. Also men do not have periods, obviously, so they would not lose what they never have. I hope I have answered your question.
Post-partum amenorrhea is also known as lactational amenorrhea. It is a time of postnatal infertility that accompanies breastfeeding. This allows the body to recuperate after birth. It is also a very good method of family planning.
In addition to low body weight or excessive exercise, other causes of primary amenorrhea include Turner's syndrome, a birth defect related to the reproductive system, or ovarian problems.
Amenorrhea is most common in girls who are severely underweight and/or exercise intensely, both of which affect the amount of body fat necessary to trigger the release of hormones that, in turn, begins puberty.
Amenorrhea is when one or more periods are missed, or an absence of menstruation. Factors that cause amenorrhea include insufficient eating and excessive exercise, pregnancy and breastfeeding, certain medications such as birth control and physical deformities.
Females have the openings for the vagina, urethra, and anus.
There are many channels are in females body. Your body is always busy moving and making things also your body has to make sure it has the right material cells and how many enter and exit the body.
There isn't an extremely big difference between male and female resting heart rate but you can certainly notice some difference. Males have a larger body mass causing their body to work harder to pump oxygen and nutrients throughout the body and pump CO2/waste out of the body. Where as females have a slightly smaller body mass, meaning their body doesn't have to work as hard as the males. The result of this is that Females do have a lower heart rate than males but not by a massive amount.
I do not know1
The Endler's has a golden tint to it's body, while the guppy has a gray/silver tint to it's body.
chromosomes arragement in body cell of females
12-13%