How can a woman 35 yrs of ago do her best to prevent birth defects before becoming pregnant?

Answers:

Consult a doctor regarding what vitamins and mineral supplements would be accurate. Also, if you're truly concerned, an amniocentesis is an option.

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take folate

drink well

avoid teratogens (thalidomide etc)

be immunised against rubella

avoid toxoplasmosis, rubella (immunised), Cytomegalovirus and Herpes virus

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Start intake very well and start taking pre-natal vitamins ASAP.

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folic tart i believe is the best vitamin to prevent birth defect its found surrounded by some foods also like stawberrys and sunflower seed

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All of the answers earlier me had some truth to them, but deplorably there is really zilch specific you can do in direct to prevent genetic defects similar to Down syndrome. Women are born with adjectives the eggs already present in their ovaries, so the after that in your energy you get pregnant the longer the egg be exposed to possible environmental hazards. After you carry pregnant you have option to check whether your baby have some genetic problems. In the first trimester the doctor can do CVS - good choice if you consider abortion - or amniocentesis surrounded by the second trimester. Some doctors would argue that the procedure itself has more risks than the actual statistical risk of have a baby beside a genetic disease. After talking to your doctor it is your judgment to make.
Having regretful this, it is always a polite idea to put away right and take folic sour before and during your pregnancy. Folic sharp is to prevent spinal birth defects, which are unrelated to age.
Hope this help!