Your pregnancy and baby guide
You and your pregnancy at 1 to 3 weeks
Open all pages about Your pregnancy and baby guide
- Secrets to success
- Am I pregnant?
- Early days
- Week by week
- Preparing for the birth
- Work out your due date
- Tests scans and checks
- Your pregnancy (antenatal) care
- Your health and wellbeing
- Existing health problems
- Common pregnancy ailments
- Pregnancy-induced conditions
Labour and birth
- The start of labour
- The birth
- Emotions and worries
- Premature babies
- How to breastfeed
- Breastfeeding problems
- Lifestyle and breastfeeding
- Bottle feeding
- Newborn screening tests
- Newborn essentials
- New parents
- New mums
- Twins and multiples
Babies and toddlers
- Weaning and solid foods
- Baby health and care
- Spotting signs of serious illness
- Reflux in babies
- How to take a baby's temperature
- Reducing the risk of SIDS
- Treating a high temperature
- Sleep problems in children
- Coughs, colds and ear infections
- Diarrhoea and vomiting
- Infectious illnesses
- Children's medicines
- Looking after a sick child
- Serious conditions and special needs
- Constipation in young children
- Your baby's height and weight
- Baby health and development reviews
- Leg and foot problems in children
- Learning, play and behaviour
- Safety and accidents
Your weeks of pregnancy are dated from the first day of your last period.
This means that in the first 2 weeks or so, you aren't actually pregnant – your body is preparing for ovulation (releasing an egg from one of your ovaries) as usual.
Your "getting pregnant" timeline is:
day 1: the first day of your period
day 14 (or slightly before or after, depending how long your menstrual cycle is): you ovulate
within 24 hours of ovulation, the egg is fertilised by sperm if you have had sex in the last few days without using contraception
about 5 to 6 days after ovulation, the fertilised egg burrows into the lining of the womb – this is called implantation
you're now pregnant
You at 1 to 3 weeks
The first thing most women notice is that their period doesn't arrive.
The most reliable way of finding out if you're pregnant is to take a pregnancy test.
Once you think you could be pregnant, it's important to get in touch with a midwife or doctor to start your pregnancy (antenatal) care.
You can do this by contacting:
- your GP surgery – if you're not registered with a GP, you can find local GP surgeries
- your local hospital's maternity unit – find local maternity services
Things to think about
In the early days and weeks of pregnancy, you may not know if you're pregnant.
But you can do the following things:
- take a folic acid supplement of 400 micrograms a day while you're trying to get pregnant and until the 12th week of pregnancy
- consider taking a vitamin D supplement of 10 micrograms a day
- avoid some foods to protect against infections
- not smoking is one of the best things you can do for your baby's health
You can get supplements from pharmacies and supermarkets, or your GP may be able to prescribe them for you.
If you want to get your vitamin D or folic acid from a multivitamin tablet, make sure the tablet does not contain vitamin A (or retinol).
You can get vitamin supplements containing folic acid and vitamin D free of charge if you're under 18, pregnant or breastfeeding and qualify for the Healthy Start scheme.
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Page last reviewed: 04/10/2019
Next review due: 04/10/2022