In a Bunny there can be two types of pregnancy, the pregnancy properly said and the psychological pregnancy, or more commom call phanton pregnancy, both are identical and cause the same type of stress the difference is that at the end of the time of gestation of one babies are born and in the other nothing is born which leaves the bunny very confused, There are reports of female rabbits which even so start to develop their tits in order to have milk and may create cysts or tumours which is a big problem, so that this does not happen it is very important to sterilise the female rabbits, also at the level of physical health sterilisation avoids the appearance of cancers and cysts, as well as pyometra in the female rabbits (if you want to see more here).

In case you don't know, bunnies can get pregnant from 3 months of age, so be careful, don't think that as they are still "babies" they cannot have children.

The gestation period varies from rabbit to rabbit, but in the European Common is normally of 31 days, of course it can be a few days less or a few days more, but the average is one month.

At the beginning no one notice much difference in the female rabbits, but with the advance of the pregnancy and with the hormones all altered they will begin to notice some differences, the female rabbits become more territorial and aggressive, sometimes even growling, another indicator is the beginning to dig incessantly in the corners, this happens because in nature they begin to prepare the burrow and this is made in the ground, at this time normally it begins to be a little desperate, For them it is extremely important to make the nest, and at this moment they are always bringing hay and sticks to the nest, they normally fill their mouths with hay, the truth is that they look very cute and there are many photos of humans that don't understand how stressful this is and find it cute, in the final stage the most aggressive part of the pregnancy starts, at this time they start to pull out the hair to fill the nest for the babies that are coming.

The belly starts to get big and if they are sideways we can see some little "jumps", they are the babies inside the belly.

It is very important during pregnancy to give the  rabbit some space, if there are rabbits to separate it is the best thing to do at this time, so she can have peace and quiet, the diet should also be taken care of and reinforced (see here), have the space taken care of and with access to everything they may need at this time (hay for the nest, blankets, boxes where they can hide, etc.), it is also important that they do some exercise, run and walk to stretch their legs.

It is very important for you to understand that a pregnancy in bunnies is not pleasant for them, it is neither pleasant nor pretty, the bunnies suffer a lot and it is for this reason that neuter your bunny to avoid not only real pregnancies but also psychological ones is so important.