You are 2 weeks and 3 days

Vital cell divisions are happening as the fertilized egg begins its journey toward implantation.

263 days until your due date

The chromosomes from the sperm and egg joined over 24 hours ago. The resulting zygote, only 0.1 mm across, takes about 30 hours to complete its first division and goes on to divide into a compact ball of 16 cells.

The ball of cells is barely bigger than the original zygote. Called a morula because it looks like a mulberry, it travels toward the uterus and enters it on day 3 after fertilization. Every cell in the morula is totipotent, meaning it can become any type of cell. From now on, the cells lose this ability as they begin to specialize.

Ask a Doctor

I've ovulated. Do we need to keep having sex?

You can't be sure you've already conceived, so the usual advice is to keep having sex. Even if you've tracked your temperature or cervical mucus or used an ovulation kit, you can't pinpoint exactly when you ovulated.

Because the fertile window lasts several days, keep having sex for at least a couple of days after what you think was your most fertile time.

Sex also says "I love you" more strongly than most things, so it's good for you both to stay intimate when you're not trying to conceive.

Abstaining doesn't usually save up or improve sperm. In fact, it can have the opposite effect.

Focus on

IVF: From eggs to embryos

After the first stage of IVF, egg collection is scheduled, although not every stimulated follicle will contain an egg. Two days after collection, you're given progesterone to thicken the uterus lining. Two to five days after fertilization, the most promising embryos are chosen for transfer: one or two if you're under 40, and up to three or more if you're over 40. The aim is a pregnancy while limiting the risks of multiples. Leftover embryos can be frozen for future cycles. Recent research suggests frozen embryos do better than fresh ones, possibly because only the best are frozen and survive thawing.

IVF success depends largely on the woman's age, but on average each cycle has a 20 percent success rate.

This is general information based on NHS guidance, not medical advice, and every pregnancy is different. Talk to your midwife or GP about anything that worries you. If your baby's movements slow down or change, or you have bleeding, severe pain or leaking fluid, call your maternity unit straight away. In an emergency, call 999.