Human eggs use chemical signals to attract sperm. New research from Stockholm University, Manchester University NHS Foundation Trust and The University of Manchester shows that eggs use these chemical ...

Scientists have grown an entity that closely resembles an early human embryo, without using sperm, eggs or a womb. The Weizmann Institute team say their "embryo model", made using stem cells ...

Within hours after sperm meets egg, the zygote divides and then continues ... needed for a full human cell. What happens when zygotes don't make it to the next stage? Research suggests that ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

Mature ova are released from the ovary into the oviduct where they may be fertilised by sperm ... The human female reproductive system working during reproduction and fertilisation. The egg ...