Embryogenesis vitro

Funnanowa, M., D. Sowinska, and A. Pietrosiuk. 1991. Carum carvi L. (caraway) in vitro culture, embryogenesis, and the production of aromatic compounds. In Bajaj,... 

Iodine excess may cause thyroid dysfunction, such as hypothyroidism or hyperthyroidism, in humans. Although no direct developmental toxic effect of excess iodine was reported in humans, the body of evidence that maternal thyroid dysfunction may result in adverse pregnancy outcome is increasing. An in vitro study (Harakawa et al., 1989) investigated the effects of excess or deficiency of TH on early embryogenesis in rat embryo culture. The results showed that malformations, including open... 

A. R. Saint-Firmin. U.S. Patent 4241536 30-12-1980. GB 76-46866 10-11-1976. Embryogenesis in vitro, induction of qualitative and quantitative changes in metabolites produced by plants and products (e.g., Hyoscyamus muticus). Chem. Abstr. 94, 171236b. 

The hardest thing about imderstanding human embryogenesis is that we cannot see it experimentally. We must infer from what we can see in experiments of nature and interpolate a testable picture of what is happening when and where we cannot see. Statistically useful samples of the normal real thing are imobtainable. We can stimulate human ovaries to produce large numbers of oocytes, and we can fertilize them in vitro, after which we then may briefly watch their development. We cannot, however, safely assume that what we see in those circumstances is, or even very closely resembles, the normal, natural processes. 

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