Dr Helen O'Neill: The woman who is changing what we know about hormones
Big Fat Negative: TTC, fertility, infertility and IVF
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4.9 • 1.3K Ratings
🗓️ 6 May 2026
⏱️ 45 minutes
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Summary
Dr Helen O'Neill is many things: a mirror twin, an associate professor in reproductive and molecular genetics at UCL, and also the co-founder and chief executive of Hertility, the at-home hormone testing company which is changing what we know about infertility: the company has built up a database of 700,000 people whose responses to its health survey may shed new light on its causes. Meanwhile, O'Neill's research is giving us new information about why, for example, male embryos develop slightly faster than female embryos.
Meanwhile, Emma Whitney, director of embryology and genetics at The Evewell, explains PGT-A to us. Is it worth it?
Swears throughout (probably).
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Transcript
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| 0:00.0 | Hello. |
| 0:02.0 | You're listening to BFN. |
| 0:07.0 | This is the podcast about Infertility, IVF and the Trials of Trying for a Baby. |
| 0:15.0 | I'm Emma. |
| 0:17.0 | And I'm Gabby and we're both card carrying members of the Infertility Club. |
| 0:28.7 | Hello, how are you? |
| 0:31.0 | I'm good. How are you? |
| 0:32.2 | I'm fine. It's been a bank holiday. |
| 0:34.7 | It has. It has. If you had a nice one. |
| 0:37.1 | We had the annual Wittstable May Day celebrations, which are, like, I don't know if he's |
| 0:43.5 | in the film The Wickerman. |
| 0:45.3 | Mm-hmm. |
| 0:46.3 | But like, very strong Wickerman vibes. |
| 0:50.0 | You've got people dressed as shrubs. |
| 0:53.0 | Yes. |
| 0:53.9 | You walk around. We've got a lot of shrubs. Yes. You walk around. |
| 0:54.8 | We've got a lot of Morris dancing. |
| 0:57.1 | Fairly, I think non-problematic. |
| 1:03.1 | Yeah, I mean, we had a nice time. |
| 1:08.1 | It is very odd. |
| 1:09.1 | I saw it on your socials, as I do every year, I think. It's very bizarre, isn't it? |
| 1:14.2 | But there's like things like that all around the country that are kind of, you know. |
... |
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