Although not all multifetal pregnancies occur after the use of assisted reproductive technology, fertility treatments have contributed significantly to the increase in multifetal pregnancies. In almost all cases, it is preferable to avoid the risk of higher-order multifetal pregnancy by limiting the number of embryos to be transferred or by cancelling a gonadotropin cycle when the ovarian response suggests a high risk of a multifetal pregnancy.
All women, whatever their age, have a small chance of delivering a baby with structural abnormalities that cause physical or mental limitation. Many such abnormalities can be diagnosed and ruled out with the fetal anomaly scan.
Most serious abnormalities can be detected on a scan. However, it is not possible to see all problems. Some conditions such as cerebral palsy and autism will never be seen on a scan. The quality of imaging depends on many factors, including the position of the baby and the size of the mother.
Multifetal pregnancy reduction is defined as a first-trimester or early second-trimester procedure for reducing the total number of fetuses in a multifetal pregnancy by one or more . In most cases, the involved gestations will be higher-order multifetal pregnancies, defined by the presence of three or more fetuses. Throughout the document, multifetal pregnancy reduction is used to refer to reduction of a higher-order multifetal pregnancy by one or more fetuses.
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Although pulmonary medicine only began to evolve as a medical specialty in the 1950s, William Welch and William Osler founded the ‘parent’ organization of the American Thoracic Society, the National Association.