Is it normal if I only feel one twin move most of the time?

Indeed, it can be normal. The position of the baby sometimes makes movements less perceptible. However, if you sense one baby consistently (and not the other), it would be wise to consult your doctor.

How early can you distinguish between the twins’ movements?

Most parents start to recognise movement differentiation between 24 and 28 weeks of gestation, as babies are generally bigger and establish more obvious movement patterns.

Should I be concerned if one twin is consistently less active than the other?

Not necessarily. Variability in activity is very normal, and if one baby suddenly moves less or stops as compared to their baseline behaviours, consult with your healthcare provider.

Why One Twin May Be More Active Than the Other

When you have twins, every kick, flutter, or roll is a small sense of reassurance. However, you may notice one twin moves much more than the other. You may wonder if this is normal or something to be concerned about. Note that differences in foetal activity between twins are common and do not necessarily mean there is a reason to worry.

What Does “Foetal Activity” Really Mean?

Foetal activity is defined as the movements your babies make inside your womb. Movement includes kicks, rolls, stretches, and even hiccups. Foetal movements are generally felt between 18 and 25 weeks of gestation; however, in twin pregnancies, these movements are observable earlier or may be shared differently within the womb.
Movements positively indicate your babies' development of muscles, bones, and the central nervous system. It is also not uncommon for twins to have variability in the amount and frequency of their movements.

Why Might One Twin Move More Than the Other?

The following reasons highlight why one twin is more active.

1. Position in the womb

If one baby is lying anteriorly (closer to your abdominal wall), stronger kicks can be felt.
The other twin might be in your posterior (closer to your back) and have more cushioning, making it difficult to perceive movement.

2. Placenta placement

If the placenta is positioned in front of one twin's head (anterior placenta), it acts as a cushion, lessening the sensations. This does not indicate that the baby is less active, but rather that you are less able to feel their movements.

3. Individual personality and development

Similar to how individuals exhibit varying temperaments after birth, the babies in the womb may also display differing temperaments. One baby may be naturally more energetic, while the other prefers a calmer motion. Often, these early differences persist after birth.

4. Space sharing

The twins share the womb, but not always in equal proportions. Depending on their size and the amount of amniotic fluid, one baby may have more room to stretch and move than another. If the smaller twin is being cramped for any reason, it may move less, as it is restricted in its movements.

5. Growth patterns

Each baby grows at a slightly different rate. A smaller baby may be conserving energy or simply moving less than the bigger or stronger twin.

When Should You Be Concerned About Twin Movement?

It is essential to distinguish between normal variances and warning signs. Changes are most often harmless, but you should report to your doctor if:

A sudden decrease in activity is observed in either of the twins.
You do not feel any baby movement at all during times when they are usually active.
There is a noticeable difference in kick movements that feels unusual compared to earlier weeks.

Doctors typically recommend kick counts during a twin pregnancy. The numbers may vary somewhat, but generally, the rule of thumb is that you should feel the baby move several times within an hour or two after eating or while lying down quietly.

How Can You Track and Compare Movements?

1. Do kick counts separately

Try identifying which twin is moving and tracking each one. It may take some time, but with practice, their movement patterns will become familiar to you.

2. Note patterns, not just numbers

Some babies exhibit more movement at night or after eating. Remember, just as counting kicks is important, tracking the patterns of movements is important.

3. Use a Checklist

Set aside a couple of hours during the day when you are relaxed or calm.
Place your hands on either side of your belly to feel the movements of each twin.
Try to feel at least 10 movements from each baby in 2 hours (these numbers will vary; please follow the advice provided by your doctor).
Jot down the times and patterns in a notebook or app.

What Can You Do If One Twin Feels Less Active?

Change your lying side: Lying on your left side increases the blood supply to the babies.
Have a light snack or something cold: Sometimes, the babies get awakened by this.
Keep calm: The more stressed you get, the harder it will be for you to feel the movements.

Call your doctor if, after trying these interventions, movements are still less than expected.

What to Do Next: A Practical Checklist

Track each baby’s movement daily.
Note any sudden change in activity or decreased activity levels.
Problems should be brought to your doctor’s attention soon.
Go for regular ultrasounds and follow-ups.
Ensure you are emotionally supported and talk about your worries and concerns with those close to you.
Eat well, take a balanced diet, stay hydrated, and get good sleep.

If you notice more activity in one baby compared to another, it is a normal difference and not a cause for concern. Often, the difference is related to position, the placenta, or their personalities. However, being mindful of movement patterns and staying in contact with your physician can ease your mind and assure you of your baby's health.
Twin pregnancy can feel daunting, but with vigilance and support, it is manageable and can be an enjoyable experience.
Whether you’re pregnant, a new mom, or navigating postpartum, you don’t have to do it alone. Join our support group to connect, share, and support one another.

FAQs on Why One Twin May Be More Active Than the Other

Is it normal if I only feel one twin move most of the time?
Indeed, it can be normal. The position of the baby sometimes makes movements less perceptible. However, if you sense one baby consistently (and not the other), it would be wise to consult your doctor.
How early can you distinguish between the twins’ movements?
Most parents start to recognise movement differentiation between 24 and 28 weeks of gestation, as babies are generally bigger and establish more obvious movement patterns.
Should I be concerned if one twin is consistently less active than the other?
Not necessarily. Variability in activity is very normal, and if one baby suddenly moves less or stops as compared to their baseline behaviours, consult with your healthcare provider.