These include transgenerational increases in the incidence of obesity, polycystic ovary syndrome (PCOS), pregnancy defects, or germ cell apoptosis [ 4- 8].
These data demonstrate that the major pregnancy defects leading to embryonic lethality may have originated around the time of post-implantation to mid-gestation.
To identify the specific stage by which the pregnancy defects occurred, we examined the pregnancy status on days 5, 8 and 12, which represent the timing of embryo implantation, decidualization, and mid-gestation, respectively.
This general phenomenon might explain preterm births, problems in pregnancy, brain defects, or why some babies are born too small".
In man certain gross defects in babies at birth have been shown to be associated with effects acting through the mother in early pregnancy: gross defects of eyes and ears caused by infection of the mother with rubella (German measles); and microcephalic idiocy with diagnostic use of X ray on the mother.
Because of such later pregnancy birth defects, anticoagulation with warfarin poses a problem in pregnant women requiring warfarin for vital indications, such as stroke prevention in those with artificial heart valves.
In most cases, women must decide whether or not to terminate the pregnancy once defects are detected.
Factors that are thought to contribute to APCR in the general population and during pregnancy include defects in the Factor V protein, most frequently caused by the Leiden mutation [ 1, 30].
Errors in segregation lead to Down's syndrome, the most frequent inherited birth defect, pregnancy loss, and cancer.
Other criteria for exclusion included the presence of disease or mental impairment preventing their understanding of the instructions provided as part of the educational strategy; physical defect, pregnancy, or disability preventing regular physical exercise.
