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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).
A spontaneous vaginal delivery (SVD) occurs when a pregnant woman goes into labor without the use of drugs or techniques to induce labor and delivers their baby without forceps, vacuum extraction, or a cesarean section. [1] An induced vaginal delivery is a delivery involving labor induction, where drugs or manual techniques are used to initiate ...
This image depicts how the hormone hCG, produced by pregnant women's placentas, is detected in urine pregnancy tests to indicate a positive result. Identified in the early 20th century, human chorionic gonadotropin (hCG) is a glycoprotein hormone that rises quickly in the first few weeks of pregnancy, typically reaching a peak at 8- to 10-weeks ...
Radiocontrast-enhanced median plane CT scan of a pregnancy at 37 weeks of gestational age. Plain abdominal Xray of a pregnant women. Medical imaging in pregnancy may be indicated because of pregnancy complications, intercurrent diseases or routine prenatal care.
Fluctuations brought on during pregnancy have also been an area of interest as nearly all organ systems change during pregnancy to promote and maintain the pregnancy. It is known that pregnancy results in thickening of the vaginal mucosa and an increase in cervical secretions which in turn leads to smooth muscle cell hypertrophy and relaxation ...
A later alternative to the rabbit test, known as the "Hogben test", used the African clawed frog, and yielded results without the need to cut the animal open. [6] Modern pregnancy tests continue to operate on the basis of testing for the presence of the hormone hCG in the blood or urine, but they no longer require the use of a live animal.
A look at the lives of Dr. Susan Smith McKinney Steward, the first Black female doctor in New York, and her sister Sarah J. S. Tompkins Garnet, the first Black female principal in NYC.
The term postterm pregnancy is used to describe a condition in which a woman has not yet delivered her baby after 42 weeks of gestation, two weeks beyond the usual 40-week duration of pregnancy. [155] Postmature births carry risks for both the mother and the baby, including meconium aspiration syndrome, fetal malnutrition, and stillbirths. [156]