Is it accurate to use test strips to determine whether a boy or girl is a boy?

Many people's first reaction after they get pregnant is usually to use a pregnancy test strip to check, but in many cases, there are prohibited situations. In fact, there are many cases where the pregnancy reaction appears and the test strip is negative. Then go to the hospital for a check-up and find that you are pregnant. So, is it accurate to use a pregnancy test strip to test the gender of the baby?

Is it accurate to use pregnancy test strips to determine the gender of a baby?

The test paper can only detect whether you are pregnant, but it cannot detect the gender. To understand how long it takes for an early pregnancy test to detect pregnancy, you must first understand how long it takes for HCG to be produced after pregnancy.

1. Waiting time for sperm and egg after intercourse: 1-3 days. After intercourse, it takes some time for sperm to merge with the egg. Sometimes he may have to wait for 72 hours, waiting for the delicate egg cell to mature and come out (ovulation period) before he can meet the fusion. 2. The time it takes for sperm and egg to combine, cross the bilateral fallopian tubes and enter the uterus: 3-4 days. After the successful fusion of sperm and egg, the sperm and egg combination will grow and move through the fallopian tubes toward the uterus, and it will take about 3-4 days to reach the uterus. 3. The time that the sperm and egg combine and linger in the uterus: 2 to 3 days. After the sperm and egg combine and enter the uterus, they have to roam inside for a while before they can find a focus and finally the embryo implants in the uterus. 4. After the embryo implants, the sperm and egg combine to connect with the embryo and the uterus. The embryo will produce HCG. HCG will appear in the urine, but the concentration is very low at the beginning. Sometimes the early pregnancy test paper will not show it, or it will always show two lines, one dark and one light. The lighter ones may be very light and almost invisible. Some people also call this shallow bar a "watermark".

Therefore, HCG can only be produced from sexual intercourse to successful embryo implantation. And you can understand it by adding up the above days. How long after sex can you test positive for pregnancy?

1. If fertilization is early and embryo implantation is early, HCG will appear in the urine and body fluids about 7 days after the first intercourse, but the concentration is very low at this time, and it is difficult to detect it with an early pregnancy test. Therefore, you should wait at least 2 to 3 days for the concentration to be higher before you can see two bars, one deep and one shallow. Therefore, the early pregnancy test paper can detect pregnancy in about 10 days.

2. If a woman's ovulation and implantation are delayed, some people may need to wait about 15 days to detect pregnancy.

Is it normal for fetal movement to occur frequently during late pregnancy?

What is the reason for frequent fetal movements in the late pregnancy? Frequent fetal movements in the late pregnancy, that is, the baby's fetal movements are more than 30 times/12 hours or more than 4 times/hour, are also normal. Pregnant mothers do not need to worry too much at this time. In fact, normal pregnant women should begin to actively feel fetal movements at the 20th week of pregnancy. As the pregnancy weeks increase, the fetal movements will gradually increase, and there will be a peak at 32-34 weeks of pregnancy. However, it should be noted that after the 38th week of pregnancy, the fetal movements will gradually decrease. Because there are individual differences in fetuses, some fetuses move about 100 times in 12 hours, but less than 20 times means that the fetus has intrauterine hypoxia.

The frequency of fetal movements will change according to the time of birth. Generally speaking, fetal movements are more frequent at night and less frequent in the morning. Especially before going to bed at night, the fetus moves the most, because the fetus is more energetic at this time. Therefore, when pregnant mothers measure the number of fetal movements, they should calculate the number of fetal movements in the morning, noon, and evening respectively, one hour each time, and then multiply the sum of the three counts by 4, which is the frequency of the baby's fetal movement in 12 hours.