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Was test done to confirm that you were not pregnant before giving you the shot? The effects on fetus include premature birth, low birth weight, feminization of male fetus, problems with urethral formation in male fetus, deformed genitals and virilization in female fetus, spontaneous abortion etc.
For more details, you can discuss with a perinatologist. Go ahead with serial scans after 12 weeks, 20 weeks to see if the development of baby is going on fine.
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