Pregnancy doesn’t always unfold the way books and movies promise. It’s not often a timeline of glowing skin and serene anticipation; instead, it’s more typically a series of physical challenges, emotional shifts, and moments where you wonder, Why did nobody tell me this?
Each trimester has its own rhythms, challenges, and small surprises (or sometimes big ones), and understanding what often shows up in each stage—and hearing how other women experienced it—can make the whole process feel a little more normal.
Signs and Symptoms of Early Pregnancy
For many people, the first trimester is when pregnancy feels the most disorienting. You may not look pregnant yet, but your body is already working overtime, and essentially going from 0 (not pregnant) to 100 (pregnant) immediately.
One of the earliest and most common symptoms are tender breasts, closely followed by morning sickness (which—misnomer—does not just happen in the mornings). This can range from a slight queasy feeling to full-on nausea or vomiting, or just an aversion to certain foods.1
Aside from nausea, pregnancy fatigue often hits hard in this first trimester due to a quick upswing in progesterone. Plus, your body is busy building the placenta and increasing blood volume, both of which demand a lot of energy.2
Early pregnancy cravings can also show up, though they’re not always dramatic. Some women crave carbs, others want fruit or salty snacks, and some just want very specific foods prepared in a very specific way. These cravings are often tied to hormonal shifts and aversions to old favorite foods.3
“I had nausea that lasted all day for weeks—and all I felt like eating was super salty chips,” says Allison, 33. “I’ve always been a sweets person, but I could not stomach anything sweet. I just couldn’t get enough salty food.”
The Second Trimester: Finding Your Footing
Many people describe the second trimester as a little more manageable. Energy levels can improve, nausea often fades, and pregnancy starts to feel more “real” as the belly grows and movement begins.
But of course, since we can’t have anything nice, new fun symptoms tend to appear during this stage, including:
Pregnancy headaches: Pregnancy headaches are fairly common during the second trimester, sometimes related to blood volume, dehydration, or posture changes. They can be frustrating, especially for those who didn’t have to deal with them during the beginning of their pregnancy.4
Cravings: Those cravings of the first trimester often continue into the second, but may feel less urgent or insane.4
Emotional shifts: Some people experience a boost in confidence during this trimester, as they begin to actually look and feel more pregnant, and some of the early symptoms like nausea wear off. Case in point:
“By about week sixteen or so, I think that was when I could finally start eating dinner again,” says Alex, 41. “And I remember the pregnancy starting to feel more real around this time too. Like, ‘Oh wow, I really am going to have a baby!’”
The Third Trimester: More Weight, More Depth
By the third trimester, your baby is getting big, which means, so are you. During this time pregnancy tends to become physically demanding in new ways. Your baby’s growth can affect your posture, sleep, and ability to breathe well.5
Other common physical symptoms during the third trimester, according to Mayo Clinic, include5:
- Backaches: Not only do pregnancy hormones relax the tissue that holds bones in place, but all this added weight can mean some intense back pain for some.
- Braxton Hicks contractions: Slight feelings of tightness in the stomach, which come and go, and may become more frequent as you get closer to your due date.
- Heart palpitations: This might sound scary, but heart palpitations are quite common during this time. If your heart palpitations are accompanied by chest pain or shortness of breath, though, contact your doctor.
- Heartburn or constipation: Pregnancy hormones can slow digestion and your growing baby is putting a lot more pressure on the intestines at this point.
- Spider veins, varicose veins, hemorrhoids: These are due to greater blood flow during the third trimester, as well as straining to go to the bathroom.
- Frequent urination: The baby is moving deeper into your pelvis by this point, putting added pressure on the bladder.
This is all not even to mention the emotional roller coaster many women experience getting so close to their due date: Excitement, fear, worry, anticipation, “Oh my god how are we going to afford this?,” etc., etc.
“By my third trimester, I was actually mostly feeling good. I do remember my back hurting a lot. But otherwise, I felt this strange sense of calmness— which was totally unlike me, really— like, I am about to have this baby. I’m ready,” says Susan, 38. “Also, I think I was just ready to be done with the pregnancy,” she laughs.
Hormone Changes During Pregnancy
We’ve briefly mentioned some vague things about “pregnancy hormones” causing all sorts of symptoms, but let’s take a closer look at the key players here:
- Human chorionic gonadotropin hormone (hCG): This special hormone is only made during pregnancy, by the placenta. It rises rapidly in early pregnancy, supporting the corpus luteum and keeping progesterone and estrogen high. It also tends to cause nausea.6
- Progesterone: Progesterone is made by the ovaries and by the placenta during pregnancy. It stimulates the thickening of the uterine lining for implantation of a fertilized egg and increases steadily, especially in the first trimester.6
- Estrogen: Estrogen is actually a group of hormones that are normally formed in the ovaries, but during pregnancy, also the placenta. Estrogen rises throughout pregnancy and helps expand blood vessels, supports fetal growth, and impacts everything from skin to mood.6
- Human placental lactogen: This hormone made by the placenta gives nutrition to the fetus and stimulates milk glands in the breasts for breastfeeding.6
- Relaxin: Relaxin helps loosen ligaments to prepare for labor; it can also make joints feel unstable in later trimesters.7
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Prolactin and Oxytocin: These hormones prepare the body for breastfeeding and labor, rising later in pregnancy.8
These hormonal shifts are essential for a healthy pregnancy—and they also explain many of the physical changes you’ll notice.
Every Experience is Valid
Across all three trimesters, it’s important to remember that there is a very wide range of what is considered “normal.” Some people experience significant morning sickness and nausea; others, not at all. Some struggle with constant headaches or shortness of breath, while others hardly notice these things.
Hearing real stories can help normalize the experience, but comparison isn’t helpful. Pregnancy is not a test you pass or fail. It’s a process your body moves through in its own way.
For those who are trying to get pregnant but haven’t yet, you’re on the right path. Reading and learning about what to expect is part of the journey; so is preparing your (and your partner’s) body. Eating well, exercising, getting plenty of sleep, and adding in supplements that can support fertility and conception, and then later, pregnancy, are vital steps to a healthy pregnancy, and ultimately, a healthy baby and mom.*
