The Second Trimester: What's Actually Normal
The second trimester (weeks 14-27) is often called the easiest part of pregnancy — nausea eases for most people, energy returns, and you start to actually feel the pregnancy instead of just managing symptoms from it. It's also when one of the most detailed screening milestones happens: the anatomy scan.
Last updated August 2026
The anatomy scan (18-20 weeks)
This detailed ultrasound checks fetal growth, organ development, and placental position in real depth — it's the single most comprehensive look at how the pregnancy is progressing before birth, and it's usually when sex can be determined if you want to know. A finding that needs a closer look (a "soft marker," a measurement outside the expected range) doesn't automatically mean something is wrong — it's common for these to need a follow-up scan that turns out normal, and your provider should walk you through what any specific finding actually means for you rather than leaving you with a vague flag.
The glucose test is coming, around 24-28 weeks
Gestational diabetes screening — typically a 1-hour glucose challenge test — is standard later in this trimester. It's testing how your body processes sugar under pregnancy's hormonal load, not something you did wrong, and it's very manageable when it comes back positive. See Gestational Diabetes: The Screening, and What a Diagnosis Actually Means for the full picture of what the test involves and what changes with a diagnosis.
Quickening — feeling movement for the first time
Most people start feeling fetal movement (quickening) somewhere between 16 and 25 weeks — often closer to 20 for a first pregnancy, and earlier for later ones since you already know what to look for. Early movement can feel like flutters or gas before it becomes unmistakable over the following weeks.
New sensations that are expected
Round ligament pain — a sharp, brief pain along the sides of the lower abdomen with position changes — is common as those ligaments stretch to support the growing uterus. Braxton Hicks contractions (the uterus "practicing") can start in this trimester too — they're irregular and clearly different from real labor. Skin changes like linea nigra (a dark line down the abdomen) and melasma ("the mask of pregnancy") are also common and typically fade after delivery.
What's worth a call
A sudden severe headache, vision changes, or sudden swelling of the face and hands can be an early sign of preeclampsia — see Preeclampsia and High Blood Pressure in Pregnancy for the full picture, since it isn't limited to the third trimester. Regular contractions, pelvic pressure, or a change in vaginal discharge before 37 weeks can mean preterm labor — see Preterm Labor: The Signs That Mean Call Now for the specific signs. And once fetal movement is established and consistent for you, a real drop-off is its own reason to call the same day.
Worth discussing with your provider
Educational information only — general patterns that vary by person. This is not medical advice, a diagnosis, or a substitute for care from your own clinician.
More from Education