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Amniotic sac. The amniotic sac, also called the bag of waters[ 1][ 2] or the membranes, [ 3] is the sac in which the embryo and later fetus develops in amniotes. It is a thin but tough transparent pair of membranes that hold a developing embryo (and later fetus) until shortly before birth. The inner of these membranes, the amnion, encloses the ...
Rupture of membranes ( ROM) or amniorrhexis is a term used during pregnancy to describe a rupture of the amniotic sac. [ 1] Normally, it occurs spontaneously at full term either during or at the beginning of labor. Rupture of the membranes is known colloquially as " breaking (one's) water ," especially when induced rather than spontaneous, or ...
Amniotic fluid. The amniotic fluid is the protective liquid contained by the amniotic sac of a gravid amniote. This fluid serves as a cushion for the growing fetus, but also serves to facilitate the exchange of nutrients, water, and biochemical products between mother and fetus. For humans, the amniotic fluid is commonly called water or waters ...
Hypercoagulability in pregnancy likely evolved to protect women from hemorrhage at the time of miscarriage or childbirth. In developing countries, the leading cause of maternal death is still hemorrhage. [23] In the United States 2011-2013, hemorrhage made up of 11.4% and pulmonary embolisms made up of 9.2% of all pregnancy-related deaths. [24]
In the United States, the level was 4 times as high, with 84 per 1,000 teenage girls pregnant. The likelihood of pregnant teenage girls having abortions across the four countries differ and exclude miscarriages. In the U.S. abortion rates for 15–19 years are 35%, compared to 69% in Sweden, 39% in Great Britain, 46% in Canada, and 51% in France.
Environmental toxicants and fetal development is the impact of different toxic substances from the environment on the development of the fetus. This article deals with potential adverse effects of environmental toxicants on the prenatal development of both the embryo or fetus, as well as pregnancy complications.
Embryo. An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes ...
Frequency. ~8% of term pregnancies, [ 2] ~30% of preterm pregnancies [ 4] Prelabor rupture of membranes ( PROM ), previously known as premature rupture of membranes, is breakage of the amniotic sac before the onset of labour. [ 2] Women usually experience a painless gush or a steady leakage of fluid from the vagina. [ 1]