Essential Guide for Dads-to-Be | What You Need to Know During Weeks 16-19

By now, your partner is well into her second trimester—the most comfortable phase of pregnancy. Early symptoms like nausea have likely faded, and your baby is growing steadily.

As a dad-to-be, you’ve probably settled into your new role, but don’t get too relaxed just yet. There’s still plenty to learn, and your support remains essential for both your partner and your baby’s health.

In this Essential Guide for Dads-to-Be, we’ll cover the key things you need to know about your partner’s health and your growing baby during weeks 16-19. Let’s keep building that knowledge together!

Key Prenatal Checkup: Second-Trimester Screening

One of the most important concerns for expectant parents is ensuring the baby is developing healthily. Between weeks 15 and 20, your partner will undergo the second-trimester screening (also called a Quad Screen) to check for chromosomal abnormalities such as Down syndrome. This blood test helps assess any potential risks.

Make sure to accompany her to this appointment—it’s crucial, and once missed, it can't be easily rescheduled. If the results come back showing a low risk, you can breathe a sigh of relief. However, if the test indicates a high risk, don’t panic. It’s just a screening, not a diagnosis. Further tests, like a non-invasive prenatal test (NIPT) or amniocentesis, may be recommended to get more accurate results.

Common Pregnancy Symptoms

Skin Changes
During this period, you might notice some changes in your partner’s skin, like dark spots or acne. These are due to hormonal fluctuations and usually fade after pregnancy. You can offer reassurance that these changes are temporary and nothing to worry about.

• Dark Spots (Melasma): Some women develop brown or yellowish spots on their forehead, nose, or chin. Remind her to apply sunscreen before heading outside to prevent further darkening caused by UV exposure. You can even carry an umbrella for her when you’re out in the sun together.

• Acne: Hormonal acne can feel like revisiting the teenage years, appearing on the face, chest, or back. Help her choose oil-free skincare products that can reduce breakouts. Plus, the shopping trip itself can boost her mood!

Linea Nigra
The linea nigra is a dark vertical line that appears on the belly, stretching from the navel downwards. Although it may cause some self-consciousness, remind her that it’s a natural part of pregnancy and will fade after birth. This "pregnancy badge" is temporary, and she’s still the beautiful mom-to-be in your eyes.

Stretch Marks
Stretch marks are another common concern for pregnant women, often appearing as pink or purple streaks on the stomach, breasts, or thighs. These may also cause mild itching as the skin stretches.

While creams and oils can’t prevent stretch marks completely, they can help keep the skin hydrated and reduce dryness. You can offer to apply some moisturizing lotion on her belly daily, turning it into a bonding ritual. If she’s particularly worried about stretch marks, suggest starting a "beauty fund" for post-pregnancy treatments like laser therapy, which can help fade them later.

Important Health Considerations

Feeling Baby Kicks
Between weeks 16 and 20, most women will begin to feel their baby’s movements, known as quickening. The baby’s arms and legs are now fully formed, and she’ll start to notice subtle fluttering sensations.

When she feels these first movements, you can share the moment by gently placing your ear against her belly. If you’re lucky, you might even hear some faint sounds! As the weeks go by and the baby grows stronger, you’ll be able to see those little kicks and twists through her belly.

Safe Sex During Pregnancy
As long as your partner’s doctor hasn’t given any special restrictions, it’s generally safe to continue having sex during pregnancy. Your baby is well-protected by the uterus and amniotic fluid, so there’s no need to worry about harm.

However, it’s important to use a condom—not for birth control, but to protect against any potential bacteria that could affect your partner’s health. If she’s not feeling in the mood, be patient and communicate openly about how she’s feeling. Over time, you’ll find what works best for both of you.