What are the symptoms of miscarriage just after implantation? What is the clinical course of late miscarriage?

What are the symptoms of miscarriage just after implantation? We should know that the first three months of pregnancy are the most dangerous period, because miscarriage is very likely to occur at this time. So what are the symptoms of miscarriage just after the fertilized egg implants?

The main symptoms of miscarriage are: vaginal bleeding and abdominal pain after menopause. Spontaneous miscarriage goes through the following process: detachment of chorionic villi and decidua - opening of blood sinus - vaginal bleeding - vitreous embryo and blood stimulate uterine contraction - expulsion of embryo - lower abdominal pain.

1. Amenorrhea: Most pregnant women with spontaneous abortion have a clear history of amenorrhea. Pregnancy can be confirmed by combining early pregnancy reactions, uterine enlargement, and the presence of an embryo sac on B-type ultrasound. However, vaginal bleeding caused by early pregnancy abortion is difficult to distinguish from menstrual abnormalities, and there is often no clear history of amenorrhea.

2. Vaginal bleeding and abdominal pain: Early miscarriage often first causes vaginal bleeding and then abdominal pain. Due to the death of the embryo or fetus, the chorionic villi and decidua are separated, the blood sinuses are opened, and vaginal bleeding occurs; the separated embryo or fetus and the blood stimulate the uterus to contract, expel the embryo or fetus, and produce paroxysmal lower abdominal pain; when the embryo or fetus is completely expelled, the uterus contracts, the blood sinuses are closed, and the bleeding stops.

The clinical course of late miscarriage is similar to that of premature and full-term labor: after paroxysmal uterine contractions, the fetus and placenta are expelled, and vaginal bleeding occurs. In late miscarriage, the placenta is firmly attached to the uterine wall. If the placenta adhesion is only partially detached, the residual tissue affects uterine contraction, blood sinuses open, and can cause massive bleeding, shock, and even death. If the placenta remains for too long, placental polyps may form, causing repeated bleeding, anemia, and secondary infection.

The symptoms of late spontaneous abortion are similar to those of premature birth and full-term birth. After the placenta and fetus are delivered, there is generally not much bleeding. Abdominal cramps appear first, followed by vaginal bleeding.