Fig. 1

Principal component analysis (PCA) of oocytes from humans, pigs and mice. A PCA of all samples from humans. B PCA of all samples from pigs. C PCA of all samples from mice. Ellipses show the 95% confidence interval in each stage. PCA, principal component analysis; hGV, human germinal vesicle; hMII, human metaphase II; pGV, pig germinal vesicle; pMII, pig metaphase II; mGV, mouse germinal vesicle; mMII, mouse metaphase II