First, how long can I see the gestational sac after conception?
Usually, it takes 4-5 days for a fertilized egg to be successfully implanted. When the fertilized egg develops into an embryo and becomes an yolk sac, it will continue to develop after the axis grows. At this time, the gestational sac has slowly appeared. Generally, when the pregnant woman is in the sixth week of pregnancy, she can see the gestational sac by doing abdominal B-ultrasound.
Second, why can't you see the gestational sac when you are pregnant?
1, every woman's physique is different, and her menstrual cycle will be different. If a woman's menstrual cycle is longer than 28 days, for example, if some women's menstrual cycle is 40 days, women's ovulation day and fertilization day will be prolonged, so the implantation time of the gestational sac will be delayed for a period of time at this time, so in this case, the gestational sac can't be seen naturally in the early stage, so it is necessary to wait for the gestational age to be longer.
2. Some women can't see the gestational sac when they are pregnant. It may be that the fertilized egg doesn't enter the uterine cavity of women because of some special circumstances, so the fertilized egg can't be implanted normally at this time. In addition, it may be that the quality of the fertilized egg is abnormal, which leads to the continued development of the embryo. In fact, this situation is biochemical pregnancy.
3. Some women can't see the gestational sac when they are pregnant, because it is late to check the gestational sac by B-ultrasound, because the gestational sac will gradually disappear and degenerate in the ninth week of pregnancy, and will completely degenerate after the first 10 week of pregnancy. At this time, the placenta has gradually formed in the uterus and provided some nutrition to the fetus, so the gestational sac can only be used before the first 10 week of pregnancy.