When women are mentally prepared to conceive, they look forward to the arrival of a new life, but at the same time, the new life is also relatively fragile and requires careful care from themselves and their families to successfully enter this world. Below is an introduction: What are the reasons for miscarriage after three or four days of pregnancy?
1. Underdeveloped embryo: Abnormalities in the fertilized egg are the main cause of early miscarriage. In the first two months of pregnancy, about 80% of miscarriages are due to defects in some sperm and egg, causing the embryo to suddenly terminate at a certain stage of development.
2. Endocrine dysfunction: The fertilized egg implants into the uterine wall under the action of progesterone and grows and develops into a fetus. When the secretion of progesterone in the body is insufficient, it can cause abnormal development of the uterine decidua, thereby affecting the development of the fertilized egg and easily leading to miscarriage. If prostaglandins increase, it may cause frequent contractions of uterine muscles, which can also lead to miscarriage. When thyroid function decreases, it can also impair cellular oxidative capacity, affecting further embryonic development and leading to miscarriage.
3. Reproductive organ diseases: Uterine abnormalities such as bicornuate uterus, mediastinal uterus, underdeveloped uterus, pelvic tumors, especially submucosal fibroids, can affect fetal growth and development and lead to miscarriage.
4. Trauma: Pregnant women's abdomen can also experience uterine contractions and miscarriage due to external impacts, pressure, falls, or heavy physical labor, as well as abdominal surgery for appendicitis or ovarian cyst surgery.
