Second Trimester Of Pregnancy week by week Article WEEK 13 The start of your second trimester is the start of lots of new development milestones for your baby. Read more about this week. Article WEEK 14 Your baby is about the size of a grapefruit! Have you felt her move or kick yet? If not, you should be able to in the next weeks! Read more about this exciting time. Article WEEK 15 Though your baby is planted deep inside you, this is the week where everything gets set up for his sense of smell. Read more about this week. Article WEEK 16 If you could see inside yourself and watch your growing baby, you would see him sucking his thumb! He has finally managed to get to his mouth. Read more about this week. Article WEEK 17 Your little one now weighs around 150g and is looking more and more like a “real” baby every day. Read more about this week. Article week 18 Lots of leaps and bounds happening in week 18, from nerve cells multiplying to the beginnings of fingerprints. Read more about this week. Article WEEK 19 Your little lodger weighs around 335g now – weigh a grapefruit in your hand and that’s about how heavy she is. And just as juicy! Read more about this week. Article WEEK 20 There’s so much going on in your belly this week that you may want to take a little nap after reading about it! Read more about this week. Article WEEK 21 Though the baby now weighs around 400gms, your little darling still has plenty of room in your belly. And likes to use it when not asleep! Read more about this week. Article WEEK 22 If you could look inside, you’d see your baby sucking her thumb, her sucking reflex practically perfected now. It’s nature’s way of getting her to breastfeed from birth. Article WEEK 23 Your baby is now 29cm long from head to toe and weighs considerably over 550g. You have got around 16 more weeks to go! Read more about this week. Article WEEK 24 Can you feel the baby reacting to noises and your caresses yet? Towards the end of the second trimester is when that starts to happen, so be on the lookout. Read more about this week. Article WEEK 25 Two more weeks left of the second trimester. You are gearing up for the home stretch. Your baby’s sense of touch is starting to blossom. Read more about how to help feed it. Previous trimester See all Next trimester