Will low male sperm motility lead to fetal arrest? Why is it easier to have a fetal arrest when you are older?

Fetal arrest means that the fetal heart rate stops. A fetus with fetal arrest cannot continue to grow and develop to a large extent. There are many reasons for fetal arrest. Can low sperm motility in men cause fetal arrest? Why are older women more likely to have fetal arrest when they are pregnant?

Can low sperm motility lead to miscarriage?

Common male factors that cause embryo arrest generally do not consider sperm motility, but mainly include chromosomal abnormalities and sperm nuclear dysfunction. The former is easier to understand. If the male's chromosomes are abnormal, there will be problems with the genetic material carried in the sperm, which may lead to miscarriage and embryo arrest due to genetic problems after the embryo is formed.

Secondly, if the sperm nuclear function is abnormal, such as the sperm DNA fragmentation rate is too high, normally a piece of glass should be transported to the egg, but when it arrives, it becomes glass shards. This is definitely not acceptable.

Therefore, there is no need to take contraceptive measures all the time just because of weak sperm motility and worry about embryo arrest. If the sperm motility is not too weak, you can try to conceive first, and you don't have to wait until you pass the test before preparing for pregnancy.

Why is it easier for pregnancy to stop at an older age?

Generally speaking, if a woman is over 35 and becomes pregnant, it is considered advanced pregnancy, and the risk of chromosomal abnormalities in the embryo increases, making it more likely to stop developing. In addition, increasing age leads to a decline in female ovarian function, and a decrease in hormone levels leads to reduced support for the embryo, which may increase the risk of embryonic arrest.

Secondly, just like the man, if the woman has chromosomal abnormalities, the chromosomes of the embryo will also be abnormal, and it is very likely that the embryo will arrest and be naturally eliminated.

Thirdly, some immune factors on the female side may also lead to embryonic arrest, such as if the woman suffers from systemic lupus erythematosus, or has positive anti-endometrial antibodies, anti-ovarian antibodies, anti-chorionic gonadotropin antibodies, etc.

There are also some reproductive system anatomical and pathological factors that can cause embryonic arrest, such as the endometrium is too thin or too thick, which is not conducive to the growth and development of the embryo. Uterine diseases such as uterine fibroids and endometriosis are also reasons that affect embryonic development. Finally, exposure to some harmful substances during pregnancy may also cause embryonic arrest.

Will umbilical cord around the neck cause fetal arrest?

This can easily happen when the umbilical cord is too long, the fetus is too small, or there is too much amniotic fluid. It can also happen when the fetus moves too often. The umbilical cord is too long and entangled, forming a true scab over time, forming a ring, and then the fetus moves into the ring, forming the umbilical cord around the neck.

The umbilical cord is elastic. If it is wrapped loosely, it will not have a big impact on the baby. Only when it is wrapped tightly will the fetus have difficulty breathing or even die. However, the tightness of the wrapping is not closely related to the number of wraps, but the remaining length.

If it is not very serious, you can try to give birth. If the umbilical cord is still entangled during delivery, the doctor will cut the umbilical cord immediately, which will have little impact on the baby.