Fetal Movements: Meaning and Monitoring in Pregnancy

What Are Fetal Movements?

Fetal movements refer to all active movements made by the unborn baby (fetus) inside the uterus that can be felt by the pregnant person. These movements include kicking, rolling, stretching, turning, and hiccup-like jolts. Regular perception of fetal movements is an important sign of the well-being and vitality of the unborn baby.

When Can Fetal Movements Be Felt?

Although the fetus begins moving as early as week 8 of pregnancy, these early movements are not yet perceptible to the mother. The first consciously felt fetal movements typically occur between weeks 16 and 25 of pregnancy:

• First-time mothers often feel movements only from around week 20 to 25, as they are not yet familiar with the sensation.
• Mothers who have been pregnant before may recognize the characteristic movements as early as week 16 to 18, as they already know what to expect.

The first perception of fetal movements is medically referred to as quickening and is considered an important milestone in pregnancy.

What Do Fetal Movements Feel Like?

The sensations change as the pregnancy progresses:

• Early stage (weeks 16–24): Often described as a gentle fluttering, tingling, or bubbling sensation — similar to butterflies in the stomach or gas.
• Middle stage (weeks 24–32): Movements become stronger and more distinct. Kicking, pushing, and rolling can be clearly distinguished.
• Late stage (from week 32 onward): Movements may become visible from the outside and can occasionally feel uncomfortable or even painful as the baby grows larger and space becomes more limited. The frequency may decrease slightly, but intensity may increase.

Why Are Fetal Movements Medically Important?

Fetal movements are a key indicator of the health status of the fetus. Active movements indicate that the nervous system, musculoskeletal system, and oxygen supply of the fetus are functioning well. Changes in movement patterns or a sudden reduction in movements can signal potential problems and should be evaluated by a healthcare provider promptly.

Normal Movement Patterns and Monitoring

From week 28 of pregnancy onward, many obstetric providers recommend that expectant mothers consciously monitor fetal movements. A widely used method is the kick count: the number of movements the baby makes within a set time period (e.g., 2 hours) is counted. A commonly cited guideline is at least 10 movements in 2 hours. However, it is important to note that every baby has individual patterns and periods of rest or sleep (approximately 20–40 minutes) are completely normal.

Factors Influencing Fetal Movements

Various factors can affect the perception and frequency of movements:

• Time of day (the fetus is often more active in the evening)
• Meals (a rise in blood sugar can increase fetal activity)
• Position of the mother (lying on the left side enhances perception)
• External stimuli such as noise or light
• Rest phases and sleep cycles of the fetus

When to Seek Medical Attention

Pregnant individuals should seek immediate medical or midwifery care if:

• fetal movements noticeably decrease or stop altogether
• fewer than 10 movements are felt within 2 hours (from week 28 onward)
• there is a sudden, unusual decrease from the baby's usual activity level
• additional symptoms such as pain, bleeding, or fluid loss occur

When in doubt, always seek medical advice. Immediate assessment using cardiotocography (CTG) or ultrasound can be performed to evaluate the condition of the fetus.

Diagnosis and Assessment Methods

The following methods are used to assess fetal activity and well-being:

• Cardiotocography (CTG): Monitoring of the fetal heart rate and uterine contractions. Fetal movements are generally accompanied by a transient increase in heart rate (so-called accelerations).
• Ultrasound examination: Assessment of movement activity, muscle tone, breathing movements, and amniotic fluid volume (biophysical profile).
• Doppler sonography: Measurement of blood flow in the umbilical cord and fetal vessels to assess the supply situation.

References

1. Stacey T. et al. - Decreased fetal movements and the association with serious adverse outcomes: a prospective cohort study. BJOG: An International Journal of Obstetrics and Gynaecology, 2011;118(12):1452-1459.
2. World Health Organization (WHO): WHO recommendations on antenatal care for a positive pregnancy experience. WHO, Geneva, 2016. Available at: https://www.who.int
3. Royal College of Obstetricians and Gynaecologists (RCOG): Reduced Fetal Movements. Green-top Guideline No. 57. RCOG Press, London, 2011.