Zelleta is a progesterone-only pill (mini pill for short) which is taken once daily at the same time – it doesn’t get any more simple than that. It’s easy to use, reliable and, because it doesn’t contain oestrogen, is well tolerated compared to many combined pills. And you don’t need to take a 7-day, pill-free break when you use it – just take one pill at the same time each day.
How does it stop you getting pregnant? Couple of ways. The main one is that it makes your cervical fluid thicker. So for sperm, swimming to an egg = quest thwarted.
Not all of the time but most, Zelleta stops ovulation as well. This is when your ovaries pop an egg out ready to be fertilised. No egg = no fertilisation = no conception.
It also stops your uterine wall from getting thicker. So the uterine wall is where a fertilised egg takes root and develops into a baby. When this wall stays thin, it means an egg can’t latch on there – but it also means your periods are lighter too. Most women on the mini pill find they don’t get a period at all while they’re on it.