What are the reasons for girls not having menstruation? First of all, it may be pregnancy

The reasons why girls do not have menstruation are, first of all, pregnancy factors, which is more common; secondly, drug factors, including contraceptives, weight-loss pills and drainage drugs, which may all cause girls to not have menstruation; then there are some pathological factors, including pituitary factors, uterine factors and ovarian factors; finally, there are some other factors.

In real life, due to various reasons, many women do not have menstruation, which brings serious mental distress to women, fearing that it will affect their physical health. So, what is the reason for this situation? Let's find out!
1. Pregnancy factors <br/>If a woman has sexual intercourse, she can use an early pregnancy test strip to test her urine 7 days after her period is delayed. If she is pregnant, the result will be positive; if she is not pregnant, the result will be negative.
2. Drug factors
(1) Contraceptive pills <br/>The ingredients in the drug can also affect the secretion of estrogen by the ovaries, causing the endometrium to not grow normally and become thin, thus causing a decrease in menstrual flow or amenorrhea.
(2) Diet pills <br/>Some hormonal diet pills contain thyroid hormones. Improper use of diet pills can easily cause menstrual disorders in women, resulting in irregular menstruation or amenorrhea, affecting normal menstruation and, in severe cases, causing infertility.
(3) Drainage drugs : Drainage drugs will damage the endometrium after entering the human body, which requires a period of time to repair. Usually, menstruation will resume about a month after the abortion, but menstruation may not come for 40-50 days.
3. Pathological factors
(1) Pituitary factors : If there is a change in pituitary function, it will also cause a decrease in ovarian function. Common pituitary diseases include tumors and hypopituitarism.
(2) Central nervous system factors : When the central nervous system is stimulated, changes in ovarian function can lead to amenorrhea. Hypothalamic tumors can also cause amenorrhea.
(3) Ovarian factors : If the ovaries are unable to secrete hormones, there will be no changes in the endometrium, and endometrial shedding will not occur.
(4) Uterine factors : If a woman has some uterine problems, it may also cause amenorrhea. Common causes include congenital absence of the uterus, uterine hypoplasia, or childhood diseases involving the endometrium.
4. Other factors <br/>Such as excessive mental stress, high work and life pressure, changes in living habits and irregular work and rest, including changes in diet and environment, etc., may affect endocrine function and may cause menstruation to occur or be delayed.