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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
Thyroid conditions may make getting pregnant impossible.
Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
![In 1885 masked Nebraskans seeking access to water posed for photographer S. D. Butcher, who captione](https://biology-forums.com/gallery/47/medium_376063_22_08_15_11_31_04_223822138.jpeg)
![A graphic depiction of predisposing alleles characteristic of a threshold trait within a population,](https://biology-forums.com/gallery/44/medium_671907_23_01_22_7_36_25.gif)