Sex before / after 7 days of menstruation, pregnancy?

1. How is the embryo – the first stage of the fetus – formed? The embryo is the result of successful fertilization. That is, the fusion of two haploid male gametes, the sperm and the female ovum, to form a diploid zygote, which is the fertilized egg. This zygote will be the starting cell for all subsequent cells of the fertilized egg.
Therefore, it is not always possible to get pregnant by having sex, this also depends greatly on the number of sperm released at each ejaculation. The most important thing is whether the egg meets the sperm for fertilization to take place.
The ability of sperm to live in the female genital tract is 2 to 3 days. Female oocytes can only retain the ability to fertilize for about 6 to 24 hours. Beyond this time, the ovum can no longer be fertilized. Thus, having sex depends on the day of ovulation to have the expected conception results.

2. Menstrual cycle in women Menstrual cycle is counted from the first day of bleeding (menstruation) is the first day of the cycle, until before the day of the next menstrual period. Each menstrual cycle in women consists of 4 phases: menstrual phase, follicular phase; ovulatory period; luteal phase.
The length of each period can vary from woman to woman and it can vary due to a number of factors.
2.1. Menstrual phase Menstrual phase is the first phase of the menstrual cycle. This phase is the days when you have your period.
This stage is because the egg in the previous menstrual cycle was not fertilized, went through stages and was eliminated from the body. The change of female hormones, mainly a decrease in estrogen and progesterone, causes the lining of the uterus to thicken to prepare for the implantation and development of the egg in the previous period to be shed and out with menstrual blood.
During the menstrual period, you may encounter some unpleasant problems such as: abdominal pain, mood swings, fatigue, cramps, back pain... Normally, the average number of menstrual days of Females are from 3 to 7 days. Some cases can be longer, but if your period is more than 10 days, you are most likely in a state of menorrhagia. Seek immediate medical advice and treatment.
2.2. Follicular phase The follicular phase is the time to prepare and select a "superior" egg for the menstrual cycle. This phase overlaps with the menstrual period and ends with ovulation. The stage of preparation and formation of follicles is controlled by the hypothalamic-pituitary axis, with the participation of follicle-stimulating hormone (FSH), this hormone will help the maturation of the ovum and help with selection. the healthiest eggs for fertilization to take place.
The hormonal changes during this period is the increase of estrogen, which helps prepare the lining of the uterus to prepare for the implantation and development of the egg.
The duration of this phase can range from 11 to 27 days depending on whether your cycle is long or short.

2.3. Ovulation phase The ovulatory phase begins when levels of the hormone LH rise and peak, stimulating ovulation. The egg is caught by the tubal tentacles and moves in the fallopian tube thanks to the peristalsis of the tubal smooth muscle to reach the fertilization site - the outer third of the fallopian tube. However, the maximum time that an egg can be fertilized is 24 hours, after this period the egg will no longer be fertilized and enter the luteal phase.
If the egg is successfully fertilized, a zygote will form and begin a long process of fertilization, implantation and embryo development.
Ovulation is when your ovaries release a mature egg. The egg travels down the fallopian tube towards the uterus to be fertilized by the sperm.
During this period you can easily identify thanks to some of the following signs: body temperature is higher than normal, vaginal discharge is thicker like egg white...
2.4. The luteal phase If the egg is not fertilized, the corpus luteum is destroyed. The corpus luteum is the site of progesterone and some estrogens to prepare the endometrium for implantation and embryo development. Therefore, when the corpus luteum disappears, it will cause a decrease in these two hormones and cause the endometrium to gradually shed. It will come out with menstrual blood and start the menstrual phase of the next menstrual cycle.
The luteal phase is the most stable, lasting 14 days from the onset of ovulation. If you have sex during this period, there is a high chance you will not get pregnant because during this period the egg has lost its ability to fertilize and is gradually disappearing.

3. At what time is the most likely to get pregnant? Understanding the nature of the menstrual cycle and how long sperm and eggs last will help you know when sex is most likely to get pregnant and when is not.
Both the male gamete - sperm, and the female gamete - egg are needed, now at the site of fertilization, for you to be able to get pregnant. So if you have sex on the day of ovulation, your chances of getting pregnant are highest.
However, it is estimated that the life span of sperm is 2 to 3 days in the female reproductive tract. The lifespan of a fertilized egg is only about 6 to 24 hours. Thus, it partly helps to answer the question at the beginning of the article.
If we have sex before 7 days of menstruation, the possibility of pregnancy is very low, because this is in the later stages of pregnancy - the luteal phase (lasting 14 days), at this time the egg has been destroyed. changes and is no longer able to fuse with sperm. When having sex during this time, you can rest assured that you are not pregnant, except in some cases of disturbances. If you have sex after 7 days of your period, you can still get pregnant, because the period of preparation and preparation of the follicle ranges from 11 to 27 days. This stage is unstable and most susceptible to changes from external factors. There are cases where ovulation is recorded right after the end of the menstrual period, so if you want to not get pregnant, you should use safe contraception if you have sex during this time. The best time to get pregnant is to have sex at the most fertile time of your menstrual cycle. This period is called the “conception window” and lasts about 6 days, including the 5 days before ovulation and the day of ovulation. In which the 2 days before ovulation and the day of ovulation have the highest probability of conception. The way to calculate the time of conception is based on the viability of the sperm and the egg. The ability of sperm to live in the female genital tract is 2 to 3 days. Female oocytes can only retain the ability to fertilize for about 6 to 24 hours.

3. Some early signs that you may be pregnant Some subjective symptoms that a woman can feel during pregnancy is a missed period. This sign is reliable if you are of childbearing age, have regular menstrual history, are not breastfeeding or are not using any hormonal contraceptives. digestion, urination, breast changes, cravings or loss of appetite for a food that you used to enjoy.