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Superfetation. Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. [1][2][3] In mammals, it manifests as the formation of an embryo from a subsequent menstrual cycle, while another embryo or fetus is already present in the uterus.
Pregnancy in fish. Appearance. A pregnant Southern platyfish. Pregnancy has been traditionally defined as the period of time eggs are incubated in the body after the egg-sperm union. [ 1 ] Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish, e ...
To make your pregnancy eating plan less stressful, we asked Vanessa Rissetto, registered dietitian and CEO o 19 Pregnancy Super-Foods You Can Eat During All 3 Trimesters, According to a ...
Methylmercury, a worldwide contaminant of seafood and freshwater fish, is known to produce adverse nervous system effects, especially during brain development. Eating fish is the main source of mercury exposure in humans and some fish may contain enough mercury to harm the developing nervous system of an embryo or fetus, sometimes leading to ...
The fetal brain is especially sensitive to mercury, so children and people who are pregnant or breastfeeding should avoid high-mercury fish like king mackerel. Fish is also a source of ...
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Pregnant woman eating fruit. Nutrition and pregnancy refers to the nutrient intake, and dietary planning that is undertaken before, during and after pregnancy. Nutrition of the fetus begins at conception. For this reason, the nutrition of the mother is important from before conception (probably several months before) as well as throughout ...
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