Roe did not have an abortion. Roe vs Wade did not pass until after the baby was born.
Summary: This report reviews available statistics regarding reasons given for obtaining abortions in the United States, including surveys by the Alan Guttmacher Institute and data from seven state health/statistics agencies that report relevant statistics (Arizona, Florida, Louisiana, Minnesota, Nebraska, South Dakota, and Utah).
The official data imply that AGI claims regarding "hard case" abortions are inflated by roughly a factor of three. Actual percentage of U.S. abortions in "hard cases" are estimated as follows:
in cases of rape, 0.3%;
in cases of incest, 0.03%; in cases of risk to maternal life, 0.1%; in cases of risk to maternal health, 0.8%; and in cases of fetal health issues, 0.5%.
About 98.3% of abortions in the United States are elective, including socio-economic reasons or for birth control. This includes perhaps 30% for primarily economic reasons and possibly 0.1% each for sex selection and selective reduction of multifetal pregnancies.
http://www.johnstonsarchive.net/policy/abortion/abreasons.html