Ben Carson, the neurosurgeon and Republican presidential candidate who has condemned Planned Parenthood’s donations of fetal tissue, once carried out research on tissue from aborted fetuses.
Jen Gunter, an OB/GYN and science writer, put on her blog Wednesday night a study co-authored by Carson in 1992 that used tissue from two fetuses aborted at nine and seventeen weeks, according to the paper.
But in the wake of hidden-camera videos alleging that Planned Parenthood illegally sold fetal tissue to researchers, Carson told CNN that the organization “doesn’t seem to understand the sanctity of human life and is willing to destroy that” and “virtually everything that can be attributed to progress by using fetal tissue can also use other types of tissue.”
Carson denies any contradiction between his stance on Planned Parenthood and his former research. He told Buzzfeed, “Killing babies and harvesting tissue for sale is very different than taking a dead specimen and keeping a record of it, which is exactly the source of the tissue used in our research.”
Planned Parenthood admitted donating fetal tissue to researchers but has denied seeking payment beyond legal reimbursement for its costs.
More Must-Reads from TIME
- Donald Trump Is TIME's 2024 Person of the Year
- Why We Chose Trump as Person of the Year
- Is Intermittent Fasting Good or Bad for You?
- The 100 Must-Read Books of 2024
- The 20 Best Christmas TV Episodes
- Column: If Optimism Feels Ridiculous Now, Try Hope
- The Future of Climate Action Is Trade Policy
- Merle Bombardieri Is Helping People Make the Baby Decision
Write to Tessa Berenson Rogers at tessa.Rogers@time.com