Most surprising hormonal changes in pregnancy including popping joints and blurred vision

ok.co.uk:

As Rihanna reveals she’s pregnant and expecting her first child with A$AP Rocky, the physical changes that her body is undergoing are already visible by the pictures of her growing bump.

But aside from the obvious physical change, there are also many other somewhat unlikely changes that occur during pregnancy.

OK! spoke exclusively to a range of experts to learn more about these changes. “During pregnancy a woman experiences huge hormonal changes,” explains Dr Martin Kinsella. “Oestrogen and progesterone are the main pregnancy hormones, so women experience a dramatic increase in these.The amount of oestrogen produced in just one pregnancy is more than she would produce during her lifetime without a pregnancy.These hormone changes bring about lots of physical and psychological symptoms that should not be underestimated.” Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter.

You can sign up at the top of the page. How does pregnancy affect hormones? Nausea “During the first trimester oestrogen increases rapidly and this is what causes the nausea that many women experience,” explains Dr Kinsella. “This tends to ease off by the second trimester, something that’s usually put down to the decrease in levels of human chorionic gonadotropin (HCG) hormone and the change in levels of progesterone and oestrogen.” Enlarged breasts “This increase in oestrogen levels also plays a large part in milk duct development which results in enlarged breasts in the second trimester,” says Dr Kinsella.