Early Pregnancy: When Can You See the Embryo? - Obstetrics and Gynecology

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The last menstrual period was on June 36/28.
I took a home pregnancy test and it showed positive.
To confirm, I visited different obstetricians on July 2 and July 4, and both tests also indicated pregnancy, but no embryo was visible yet.
On the evening of July 5, I suddenly experienced light bleeding and immediately went to see a doctor who administered a progesterone injection.
I am feeling very anxious and confused about whether this is a real pregnancy or not.
How long does it usually take to see the embryo on an ultrasound?

Xiao Zhen, 30~39 year old female. Ask Date: 2016/07/05

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, typically a standard ultrasound can detect the gestational sac at around 5 weeks, but it is normal to see it around 7 to 8 weeks.
It is advisable to wait a bit longer.
If the pregnancy test indicates that you are pregnant, that should be confirmed.
If a gestational sac is visible, there should be no issues; otherwise, there is a possibility of an ectopic pregnancy.
It is recommended to return to your original obstetrician for continued monitoring.
Wishing you good health.

Reply Date: 2016/07/05

More Info


In early pregnancy, the detection of the embryo via ultrasound is a significant milestone for expectant parents. The term "fetal pole" refers to the early development of the embryo, which can be visualized on an ultrasound. Typically, the fetal pole can be seen around 6 weeks of gestation, although this can vary depending on individual circumstances.

When a woman becomes pregnant, the first thing that can be detected through an ultrasound is the gestational sac, which usually appears around 4 to 5 weeks after the last menstrual period. The gestational sac is a fluid-filled structure that surrounds the developing embryo. As the pregnancy progresses, the fetal pole, which is essentially the early form of the embryo, becomes visible. By approximately 6 weeks, the fetal pole should be identifiable, and by 7 weeks, a heartbeat can often be detected.

If you are experiencing bleeding during early pregnancy, it is essential to consult with your healthcare provider. Light spotting can be common and may not necessarily indicate a problem, but it can also be a sign of complications such as a threatened miscarriage or, in some cases, an ectopic pregnancy. The presence of a fetal pole and a heartbeat can provide reassurance that the pregnancy is progressing normally.

In your case, since you mentioned that you had positive pregnancy tests but were unable to see the embryo on ultrasound until later, it is important to consider the timing of your ultrasound in relation to your ovulation and conception dates. If your menstrual cycle is irregular, it may be challenging to pinpoint the exact date of ovulation, which can affect when the embryo becomes visible on an ultrasound.

Regarding your emotional state, it is entirely normal to feel anxious and uncertain during early pregnancy, especially when faced with potential complications like bleeding. It is crucial to maintain open communication with your healthcare provider, who can guide you through this process and provide the necessary monitoring and support.

In summary, the fetal pole is typically visible around 6 weeks of gestation, and if you have not seen it by that time, further evaluation may be warranted. If you experience any concerning symptoms, such as heavy bleeding or severe pain, seek immediate medical attention. Early pregnancy can be a time of uncertainty, but with proper care and monitoring, many women go on to have healthy pregnancies. Always trust your instincts and reach out to your healthcare provider with any questions or concerns you may have.

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