In this post in the Guardian’s “Response” column, Jenny Tonge, chair of the U.K. all-party parliamentary group on population, development and reproductive health, responds to a Guardian opinion piece published last month entitled “Welcome baby seven billion: we’ve room on Earth for you.” Tonge writes, “The article seems to miss the point that more than 200 million women who are sexually active and do not want to become pregnant are not using modern contraception,” adding, “The human toll of denying women the fundamental right to plan their families is extraordinarily high and also a significant source of population growth. If all women who want to avoid pregnancy were able to use and access family planning, the rate of population growth would slow substantially” (10/10).