First Trimester | Everything you need to know + tips

First Trimester of pregnancy

Hello Mama!

If you ended up here I am assuming you are either pregnant or want to be pregnant soon – either way – welcome! In this post I will talk about the feared first trimester in pregnancy: everything you should know from what is happening inside of you to morning sickness and tips, etc. Before you read the rest of this post just know that I talk out of personal experience and a lot of research, I hope this is useful to you!

First Trimester

Weeks: 1-12

What is happening inside?

A pregnancy lasts about 40 weeks, but there is a process of 2 weeks since the moment of conception until the embryo is formed. Those first two weeks is when your egg is fertilized and divides in parts, making the “home” where your baby is going to live and forming the embryo(which is how the baby is called at that time).

During this first 12 weeks, the baby will grow super fast! And around week 10 the baby will be called “fetus” and it will have a heart, tiny bones, muscles and all the vital organs. You probably have heard about women having miscarriages during the first trimester (it happens often) so it is important to be extra careful because the baby is going through major changes during this time.

To put this in simple words, this is the trimester where the baby becomes a “tiny human” and the other two trimesters are for the baby to put on weight, finish up growing and fully develop the vital organs preparing him to come out to the world. 🙂

How are you feeling?


At least I felt super crappy. Some women can’t even tell they are pregnant or have any symptoms at all at this time (hopefully you are that lucky!) but if you are like the rest of us human ladies, then you are probably feeling pretty crappy right now. What do I mean by crappy…hmm…lets see, these are some of the symptoms you have:

  • Super sore breasts (and prepare, because your breasts will grow a size or two – that’s a good thing -you will end up looking like you had a boob job lol)
  • Nausea/Vomiting : This is the worst symptom by far. You might have this for months or a few weeks depending of the person. I highly recommend Gatorade, ice chips, do not go near eggs-yuck! (or anything that makes you cringe for that matter), have lots of patience and talk to your husband or loved one about it because maybe they can cook for a few weeks or be extra understanding with you. I had nausea from week 7 until around week 22, but vomiting happened from week 10 until week 21. If you have to vomit don’t try to stop it, just make sure you stay hydrated. Some people use lemon as a remedy. Try to look for tips online and stick to the ones that work for you, what worked for me was: 1-Check your vitamin pills and get ones with less iron if you need to do so, when I changed mine everything got a little better. 2-Drink chamomile
  • Bloated
  • Cramps: just the first few weeks. ATTENTION: If you feel a cramp you don’t have to freak out but it is not a good sign either so try to sit or rest whenever you feel a cramp, specially if you are tired. It might not be anything but it is better to be safe than sorry.
  • Tiredness: Try to rest as much as you can. It is necessary for you and your body. If that means you have to go to bed at 8pm every night so be it.
  • Moody: (Man, while writing this I remember how bad I felt my first trimester! It was awful. I honestly hated being pregnant it was really overwhelming. But if you are pregnant right now don’t worry: IT GOES AWAY) Hormones go crazy. Your whole body is changing so have patience and talk to your husband about it, prepare him for some huge changes in your mood. You might even feel sad, depressed. Do not let it sink, it is a normal hormonal thing, hang on and things will get better. If they don’t get better by the second trimester then talk to your doctor about it.

Things to do once you find out you are pregnant:

I found out I was pregnant by week 4 but most people find out at week 7. Either way you should do this:

  1. Start taking prenatal vitamins with at least 400 mg of folic acid: You can get them at any pharmacy over the counter and these are good to take even if you are not pregnant and you are just trying to get pregnant. I got these:Rainbow Light – Prenatal One Multivitamin, 150 Count(They will last you for about 5 months)
  2. Look for an obgyn or midwife and get your first appointment (I got a midwife and I will be posting about why soon)
  3. Calculate your due date. You can use an online due calculator.
  4. Find out about foods you can’t eat and things that you shouldn’t be doing.
  5. Get a pregnancy app: I tried many, but my favorite (and the only one I ended up using) was Ovia pregnancy app. It is super useful because it tells you tips, the size of your baby, what is happening week by week and it has a food safety look-up tool and more.
  6. Make a pregnancy announcement (for the father and the relatives and decide when to tell them. Many people wait until the first trimester is over but I like to do it as soon as I find out. If I lose it, I want my family and friends to know and support me too)
  7. Get rid of unhealthy habits. (If you can, quit smoking and drinking-although you can have the occasional beer)

Weight gain:

Maybe a couple of pounds, around 2 to 4 pounds is the normal but less is okay. I gained 2 lbs in my first trimester with Catalina.

Tip: Try to do some kind of light exercise or move at least 30 mins a day to keep somewhat fit, it will help you a lot.


If this is your first pregnancy you are probably not showing yet. I started showing at 20 weeks more or less, but you will be bloated so maybe you can notice a small bump.

If this is not your first pregnancy then you will most likely be showing towards the end of the trimester.

I hope you liked this post. Leave a comment below if you have any questions and subscribe! I have lots of good things prepared!

Sincerely, Josie