A 26-year-old woman, gravida 1, para 0, aborta 1, wasreferred to our hospital in her 22nd week of pregnancy. Shehad an upper respiratory infection during pregnancy without any medical treatment. She had been taking folic acidfor 4 months before pregnancy. She has been using an electric blanket as heating equipment while sleeping at nightduring pregnancy. She was a farmer. She did not use prescribed medications, tobacco, alcohol, or illicit drugs. Herpregnancy was spontaneous, and her medical and familyhistories were unremarkable. Neither she nor her husbandhad a family member with a history of twinning or congenital anomalies.
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