Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Human blastocyst within the zona pellucida. Jenny Nichols. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/B0006488/full/800%2C/0/default.jpg)
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Human blastocyst within the zona pellucida. Jenny Nichols. Source: Wellcome Collection.