Your baby's sex is already decided
Your egg has now been fertilised and the first steps in your baby's development have begun. Whether you are having a boy or a girl is now decided.
Your baby is called an embryo at this stage
Until around week 8 of pregnancy the medical term for your baby is an embryo. After this they will be referred to as a foetus.
Your baby will double in size by the end of the week
You may not feel like you are pregnant yet but that doesn't mean that there isn't a lot happening! Even at this early stage your baby is developing rapidly and the neural tube is already forming.
Your baby's heart will soon start to beat
Already, your baby is receiving nutrition and oxygen through your placenta. This will continue to pass them nutrients from you and oxygen throughout the next 8 months.
Baby's lungs, liver and pancreas are all being formed
You may be feeling tired at the moment and it is no wonder with all that's going on inside you. Your body is getting used to lots of physical changes and your baby is growing rapidly.
Your baby's heart is beating twice as fast as yours
An adult's heart usually beats around 60 - 100 times per minute but your baby's is already beating 150 beats per minute - this will even increase further to 170 in a couple of weeks.
This week, your baby is starting to look more like a baby! Their face is beginning to take shape and their mouth and nostrils are starting to develop. The heart has divided into the right and left chambers and is beating about 150 beats per minute - about twice the rate of an adults! You may not look or even feel pregnant, but your uterus is expanding to accommodate your growing baby. Before pregnancy it was the size of a clenched fist; now it’s as big as a grapefruit. .
You may be suffering with morning sickness throughout your first trimester. The reason for this is not fully understood but it is though to be down to your changing hormone levels. It is not a very nice experience but be assured in the fact that it is not causing your baby any harm and it will pass! Even though you may not feel like eating it is important to try to keep your energy levels up. Try to include small meals throughout the day so your stomach is never empty and sip on water throughout the day. Avoid strong smells and spicy or fatty foods which may trigger it.
Your little future genius already has a functioning and rapidly growing brain!
Your baby's head will appear larger than their body as their brain grows rapidly now. When they are born, around 25% of their adult brain will already be formed. This will increase to about 80% by the time they are 3 years old.
Fingerprints are formed in the womb by your baby touching the environment around them
Your baby is reaching out and touching structures such as the cord and the uterus walls. The pressue of this on their tiny fingers will result in "friction ridges" which form fingerprints that last a lifetime!
Baby might be tasting different flavours depending on what you eat!
Your baby's taste buds are now formed and as they swallow mouthfuls of your amniotic fluid they may experience different flavours depending on what you eat.
Baby can now get hiccups and their vocal chords are complete
Although you can't hear them making any sounds as sound can't travel through your uterus they are practising using their vocal cords before they are even born. And once baby arrives you will see that they have been giving them a good workout!
Your baby will quadruple in weight during month 4
During the second trimester you need to increase your calorie requirements very slightly. You need about 350kcal extra per day and this can be easily reached with just 1-2 extra healthy snacks.
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