If you hear people talk about pregnancy calenders they are usually talking about one of three things.

The definition will depend on who you are talking to and the context they use the phrase in.

The three most common meanings are:

1. A calender used for charting your ovulation to determine the best time to make a baby.
2. A pregnancy wheel used by doctors and midwives to establish your date of conception and estimated date of delivery.
3. A calender of your pregnancy. You can either make your own or buy one. If you just want to keep notes for yourself then any calender or diary will do but if you want to have a record for your child in later life and like to keep informed and bond with your baby throughout the pregnancy then buy one of the many great pregnancy calenders that let you write day by day notes and also gives 4 weekly updates on what is happening to your body and your baby.