What is the cause of fluid accumulation around the gestational sac?

During pregnancy, in order to check the development of the fetus, regular prenatal checkups are needed. The purpose and function of prenatal checkups are different at different stages. In daily life, some pregnant women are found to have fluid accumulation around the gestational sac and are very worried about this abnormal situation. So, what is the cause of fluid accumulation around the gestational sac? Let’s take a look below.

What is the cause of fluid accumulation next to the gestational sac?

The presence of fluid next to the gestational sac indicates that it has been separated from the uterus. Generally, it is blood accumulation, which means that the gestational sac is not stably implanted in the uterus. This situation does not necessarily cause vaginal bleeding. If there are symptoms of stomach pain or abdominal discomfort, the gynecologist will usually diagnose threatened abortion in this case. You have to be careful. The doctor will recommend treatment to preserve the fetus, pay attention to rest and keep your emotions stable.

If both ovaries are not visible, this is related to your pregnancy period. The uterus has enlarged, and the ovaries on both sides are blocked. There is also the influence of surrounding intestinal gas, so both ovaries are not visible clearly. This is normal and there is no need to worry.

During the implantation of the gestational sac, some tiny blood vessels between the decidua basalis and the decidua capsularis may bleed, forming fluid accumulation. The diameter of the gestational sac is about 2 cm at 6 weeks of pregnancy and about 5 cm at 10 weeks of pregnancy. It is normal for the gestational sac to be located at the fundus, front wall, back wall, upper part, or middle part of the uterus. A round, oval and clear shape is normal. If the gestational sac is irregular in shape, blurred, and located in the lower part of the body, and the pregnant woman also has abdominal pain or vaginal bleeding, she may have a miscarriage.

The gestational sac is the primitive placental tissue, a small embryo wrapped by the amniotic membrane and vascular network. The gestational sac is the initial form of pregnancy. At that time, the fetus has not yet formed, and the fetal heartbeat is already there when the embryonic bud appears. In the second week, the embryo implants in the endometrium. When it develops into the second germ layer, a large cavity called the primary yolk sac appears on the ventral side of the embryonic disc. The yolk sac continues to shrink and degenerate during embryonic development, but the extraembryonic mesoderm on the wall of the yolk sac is the earliest origin of the formation of blood cells, blood vessels and primitive germ cells - the gestational sac, where the fetus will grow in the future.

45 days of pregnancy gestational sac size

At 45 days of pregnancy, the gestational sac is about 15mm. Under normal circumstances, fetal heartbeat can be seen at the latest at 7 weeks of pregnancy. If no fetal heartbeat is seen and the gestational sac becomes smaller, the possibility of embryonic arrest should be considered.

45 days of pregnancy: The fetus grows to 0.85 cm, the head, brain alveoli, facial organs, respiratory, digestive, nervous and other organs are differentiated, the fetal sac is clearly visible on B-ultrasound, and the fetal bud and fetal heartbeat are seen.

Due to emotional tension and other reasons, pregnant women may have delayed menstruation, delayed ovulation, and late conception, resulting in a gestational sac that is smaller than the actual number of days of amenorrhea. For example, the menstruation has not stopped for 50 days, but the examination finds that the gestational sac is only about the size of a 40-day gestational sac. It is normal for the gestational sac to be small. As long as a dynamic examination after one week shows that the levels of chorionic gonadotropin and progesterone are gradually increasing, the gestational sac is continuing to grow, and the fetal bud and fetal heartbeat gradually appear, it means that the small gestational sac is due to physiological reasons such as delayed ovulation and late conception, and the pregnancy can continue.

Secondly, due to poor development of sperm and eggs, infection of mycoplasma, chlamydia, rubella virus in pregnant women, or exposure to toxic and harmful substances during pregnancy, the gestational sac may be poorly developed and smaller than normal. For pregnant women who experience the above situation, the gestational sac will continue to grow as time goes by during pregnancy, but no fetal bud or fetal heartbeat can be seen. In this case, the gestational sac is unhealthy and will eventually lead to miscarriage.