Yes. Estarylla contains two hormones called norgestimate and ethinyl estradiol. These work in the body like natural hormones called progesterone and estrogen.
By altering the normal hormonal cycle your body goes through every month, they basically trick your ovaries into not releasing an egg. They also stop blood from settling on the uterine wall, so it’s harder for it to get thicker and accept a fertilized egg for implantation.
Something else they do is make cervical fluid thicker. This makes it more difficult for sperm to get through to an egg.