Due to a heavy focus on older characters, a birth was a rare event in the show in the 1960s and 1970s. The depiction of the birth has also changed over time; the first birth was Paul Cheveski's, but the baby wasn't seen until a few weeks after he was born in June 1961. The first time a mother was shown in labour was when Valerie Barlow gave birth to twins Peter and Susan Barlow in April 1965, but the births themselves didn't take place on-screen. The first on-screen birth was Rosie Webster's in December 1990. Since then, every birth has taken place on-screen.
Also listed are pregnancies involving characters who had left the series by the time of the birth. Note that the list only includes pregnancies which are known to have been carried to term, through references or return appearances in later episodes.