Understanding normal early pregnancy
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An ovum (egg) is released from an ovary into a fallopian tube. This is called ovulation and usually occurs once a month about half way between periods. Sperm can survive in the fallopian tubes for up to five days after having sex. A sperm may then combine with the ovum (fertilisation) to make an embryo. The tiny embryo is 'wafted' along a fallopian tube to the uterus by tiny hairs (cilia). It normally attaches to the inside lining of the uterus and develops into a baby.
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