Diethylstilbestrol: Intergenerational Impact

Debate between Jessica Toale and Alison Bennett

Monday 29th June 2026 Commons Chamber

[Jessica Toale]

Yes, I agree that research is needed and that is one of the things that DES campaigners are calling for.

One of those 300,000 women was Rita, the mother of my constituent, Jan Hall. Rita was prescribed DES when she was pregnant with Jan, but when Jan was just a toddler, Rita died of breast cancer. She was only 32. Jan herself later developed cervical cancer in her twenties. Because of the surgeries she had to undergo, she was told she may never be able to have children. She lived not only with that physical consequence, but with decades of uncertainty, fear, grief and anger. Her daughters have experienced significant gynaecological health problems, and now Jan worries about her grandchildren as well.

Jan is not alone. Across the country, men, women and their families have come forward to share their stories and their experiences as victims of this scandal. Some of them are in the Gallery with us today and have allowed me to share some of their painful testimonies.

[Alison Bennett (Mid Sussex) (LD)]

One of the people in the Gallery is my constituent, Heather Farrant, who came to Parliament today with two of her three daughters. She has lived with the lifelong consequences of her mother’s exposure to DES. Will the hon. Lady commend Heather and all the campaigners for their bravery in speaking so publicly about something that has been hidden for a long time? Until Heather came to speak to me in my surgery, I had not heard of DES, and without those campaigners, we would not have known about it and been able to raise it here today.

[Jessica Toale]

It was a pleasure to meet Heather today, along with all the other campaigners. I thank them all for having shown such strength in coming forward to share their stories.

One of the cruellest impacts of DES, which sets it apart from other medical scandals, is that its consequences do not stop with the women who were prescribed it or their immediate children. There is growing evidence of intergenerational impacts affecting grandchildren, and possibly beyond. We do not yet know how far those consequences reach. That uncertainty is part of the harm that the families face.

Research suggests that women who took DES during pregnancy—the DES mothers—may face around a 30% higher chance of breast cancer. Female babies exposed in the womb—DES daughters—have around 40 times the risk of developing clear cell adenocarcinoma of the vagina and cervix. They also face increased risks of reproductive complications, including infertility, ectopic pregnancies, premature births and a range of other conditions and complications that we are learning about all the time.

Clare, who is in the Gallery today, described being robbed of her fertility and suffering ovarian failure, and later developing an autoimmune inflammatory condition. At the age of 18, Juliette, who is also with us, was rushed to A&E with severe haemorrhaging after a reaction to the contraceptive pill, and she has stage 4 endometriosis. Anne-Marie, who is also with us, was taken off the pill due to stroke risk and has described being housebound due to the gynaecological issues she has faced. Many of them describe managing complex hormonal challenges and, later in life, debilitating menopausal symptoms. That is a common experience for a lot of these women.