Will I get pregnant if I have sex the day after my period?

Menstruation refers to regular vaginal bleeding in women during the growth period. It is caused by the shedding of the proliferating uterine wall in preparation for pregnancy during a menstrual cycle because there is no pregnancy. People often call it the "menstrual" cycle because bleeding is a more obvious external and visible phenomenon. So is it possible to get pregnant if you have sex the day after your period?

There is a certain possibility of pregnancy. However, the key to the menstrual cycle is essentially the growth, maturity and ovulation of the ovarian oocyte; what drives this process is the regular changes of a series of hormones in the endocrine axis of the body's hypothalamus-pituitary gland, pituitary gland, and ovary, the most important of which are pituitary LH luteinizing hormone and FSH egg stimulating hormone.

In other words, a "menstrual" cycle essentially includes changes in the following three key aspects:

The "menstrual period" indicates the changes in the uterine wall. One cycle can be divided into the physiological period, the proliferative period and the metabolic period.

Based on the egg development and ovulation period, it can be divided into the follicular phase before ovulation, the ovulation phase and the mid-to-late ovulation phase;

Based on the metabolism of pituitary hormones, it can be divided into the follicular phase and the ovarian phase.

Length of menstrual cycle

Generally, a menstrual cycle is about 28 days, the menstrual period is 7 days, and the interval from menstruation to ovulation is 5 days - that is, the follicular phase is about 12 days, the ovulation period is 2 to 3 days, and the interval from ovulation to the next menarche is 13 days.

It can be seen from this that the follicular phase, which is divided by the growth and development of the egg and the changes in pituitary hormones, includes the physiological phase and proliferative phase of the physiological cycle, which is divided by the "menstrual period".

The above time distribution of each stage of the menstrual cycle is only a general "theoretical situation". In fact, the length of the menstrual cycle varies greatly.

Generally speaking, it can be divided into three categories: short cycle, basic cycle time and long cycle.

As can be seen from the chart, the ovulation period (2-3 days) and the 14-day follicular phase (12-16 days) are relatively fixed, and the biggest change affecting the length of the cycle is the follicular phase, which has a variability range of 5-20 days.

However, the length of each individual's cycle is generally regular and relatively fixed. However, this is not always the case. Due to the stimulation of various factors, a certain cycle may become different from another cycle at any time.

Pregnant

Any woman of childbearing age who has an active sexual life has the potential to get pregnant during any menstrual cycle.

The beginning and end of pregnancy are marked by the fusion of the egg cell and the male sperm to form a sperm-egg combination.

Since the egg and sperm in the woman's body have a life span of 2 to 4 days, pregnancy is likely as long as you have sex 3 to 5 days before and after ovulation, for a total of 7 to 10 days.

"Seven days after menstruation" is often the "safe period" for easy pregnancy

The question of the poster is "Can I get pregnant if I have sex 7 days after my period?"

In this way, if the menstrual period is 7 days, that is to say, on the 14th day of menarche, even if it is a normal cycle, it is also the ovulation period when it is easiest to get pregnant.

Even if the menstrual period is over in 3 days, it is still on the 10th day of menarche, plus the 2-4 days that male sperm survives in the female body, which is the 12-14th day, which can also cover the ovulation period.

Therefore, if the end of the menstrual period is used as an indicator, 7 days later is usually the "safe period" for easy pregnancy.

If it is a short cycle, the follicular phase can only be 5 days, calculated based on the 3-7 days of the menstrual period, plus the 2-4 days of sperm survival, then there is no so-called "safe period" after menstruation that is not easy to get pregnant. Even if you have sex during your menstrual period, there is still a possibility of pregnancy.

Of course, for long cycles, the follicular phase can last nearly 20 days, and 7 days after the menstrual period is over may be "safe".

The problem is, as the answerer just said, the LH and FSH that stimulate ovulation are affected by many factors. Even for women with regular menstrual cycles and long cycles, a cycle may become a short cycle at any time.

Therefore, don't say that the 7th day after the end of the menstrual period is generally in the "safe period". Even if you start calculating from the date of menarche, on the seventh day, within the so-called "safe period", it is actually possible to get pregnant.