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Gender bias, implicit bias, and obstetric violence in the medical field are also important factors when discussing maternal wellness, care, and death in the United States. [ 60 ] According to the Centers for Disease and Prevention, state prevention strategies are best developed using data from Maternal Mortality Review Committees.
Early obstetric ultrasound, comparing the size of an embryo or fetus to that of a reference group of pregnancies of known gestational age (such as calculated from last menstrual periods), and using the mean gestational age of other embryos or fetuses of the same size. If the gestational age as calculated from an early ultrasound is ...
Obstetrics is the field of study concentrated on pregnancy, childbirth and the postpartum period. [1] As a medical specialty , obstetrics is combined with gynecology under the discipline known as obstetrics and gynecology (OB/GYN), which is a surgical field.
As stated in the history section, amniocentesis can be used to determine the sex of a fetus. This can be medically relevant in families that carry X-linked genetic conditions, since parents may want further genetic testing if the fetus is determined to be male (XY), and therefore has a higher likelihood of having the inherited disease.
For example, if there is a gestational age based on the beginning of the last menstrual period of 9.0 weeks, and a first-trimester obstetric ultrasonography gives an estimated gestational age of 10.0 weeks (with a 2 SD variability of ±8% of the estimate, thereby giving a variability of ±0.8 weeks), the difference of 1.0 weeks between the ...