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Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb).
The human fetus moves throughout its entire development. Fetal movement refers to motion of a fetus caused by its own muscle activity. Locomotor activity begins during the late embryological stage and changes in nature throughout development. Muscles begin to move as soon as they are innervated. These first movements are not reflexive, but ...
Crown-rump length. An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length ( CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump).
The ultrasound that followed found two more tumors in her right breast, which turned out to be stage 1 cancer. And after reviewing her first MRI again, doctors confirmed cancer was in her left ...
A seroma is a pocket of clear serous fluid (filtered blood plasma ). They may sometimes develop in the body after surgery, particularly after breast surgery, abdominal surgery, and reconstructive surgery. They can be diagnosed by physical signs, and with a CT scan . Seromas can be difficult to manage. Serous fluid may leak out naturally, and a ...
The gestational sac is the large cavity of fluid surrounding the embryo. During early embryogenesis, it consists of the extraembryonic coelom, also called the chorionic cavity. The gestational sac is normally contained within the uterus. It is the only available structure that can be used to determine if an intrauterine pregnancy exists until ...
According to Meagan, “He wasn’t even fazed” by the ultrasound results. Cooper and Olsen were born premature at approximately 33 weeks and stayed in the NICU for their first month. Cooper ...
Pregnancy is divided into three trimesters, each lasting for approximately three months. [4] The exact length of each trimester can vary between sources. The first trimester begins with the start of gestational age as described above, that is, the beginning of week 1, or 0 weeks + 0 days of gestational age (GA).