Metronidazole effect sperm

You have questions. While older studies suggest an increased risk for various birth defects, these studies are not very reliable. Prenatal use of metronidazole and birth defects: no association. Possible role of the blood-testis barrier in dominant lethal testing. After 2 and 4 weeks of metronidazole treatment, mating performance and fertility in treated and control animals were comparable. Meet An Expert.