At pregnancy week 1, you're not pregnant just yet, but you will be ovulating in approximately 2 week's time. Here's why, just in case you're wondering.

In reality, pregnancy lasts an average of 38 weeks (266 days). However, the 40 week time frame is used because exact date of conception is usually unknown. This can be due to a variety of reasons, such as

  • frequent intercourse,
  • difficulty remembering the timeline of events and so on.
  • To confuse things further, the date of intercourse does not always correlate to the date your baby is conceived as you will soon discover in later sections.

Pregnancy Week 1 starts on Day 1 of your Last Menstrual Period (LMP)

Due to these uncertainties, 40 weeks are counted from the first day of your Last Menstrual Period (LMP) which is a fixed date known to you. This will give you your Estimated Date of Delivery (EDD).

Your Estimated Date of Delivery (EDD) can be corrected at a later stage to make it more accurate after taking into account the results from the first major ultrasound scan to date your baby (the 'dating' scan). This happens from pregnancy week 7 onwards. EDD aside, we will explore some important pre-conception tips and bring you through the changes your body is undergoing to prepare for your pregnancy.

What does Pregnancy week 1 look like for mum?

Pregnancy week 1 starts on the first day of your last menstrual cycle. As you probably already know, your uterine lining is being shed.

At the same time, hormone levels are causing your body to harvest new follicles (potential eggs to be) which have always existed inside your ovary. However, it will be another 14 days before you ovulate and only 1 of these follicles will become the egg. More on this later!