Research for campaign group the Fawcett Society showed that childbirth marked the start of a "great divide" on earnings, which continued even after children left home.
Before becoming parents, men and women were equally likely to be employed but, after having children, 57% of mothers of under fives were in paid work, compared with 90% of fathers.
Mothers working full-time suffered a pay "penalty", while pregnant women were vulnerable to discrimination, according to the report.
Is Motherhood 'devastating' to your income? Have you had to sacrifice your career for your children? Have you had to make financial sacrifices to cope? Is there enough Government support for mothers?
