CLC-Certified Lactation Counselor Practice Exam
2026 CLC- Certified Lactation Counselor
Practice Exam Questions and Answers
with Rationales
1. Which hormone is primarily responsible for milk production?
A. Oxytocin
B. ✅✅ Prolactin
C. Estrogen
D. Progesterone
Answer: ✅✅ B. Prolactin
Rationale: Prolactin stimulates milk synthesis in the alveolar cells of the breast. Oxytocin is
responsible for milk ejection (let-down), while estrogen and progesterone support breast
development during pregnancy but inhibit abundant milk production until after birth.
2. Which hormone is responsible for the milk ejection (let-down) reflex?
A. Prolactin
B. ✅✅ Oxytocin
C. Cortisol
D. Human growth hormone
Answer: ✅✅ B. Oxytocin
Rationale: Oxytocin causes the myoepithelial cells surrounding the milk-producing alveoli to
contract, pushing milk into the ducts where it can be removed by the infant.
3. A healthy full-term newborn should ideally begin breastfeeding:
A. Within 12 hours after birth
B. Within 6 hours after birth
C. ✅✅ Within the first hour after birth
D. After the mother produces mature milk
Answer: ✅✅ C. Within the first hour after birth
, CLC-Certified Lactation Counselor Practice Exam
Rationale: Early initiation of breastfeeding promotes skin-to-skin contact, stimulates milk
production, improves infant temperature regulation, and increases breastfeeding success.
4. Colostrum is best described as:
A. Mature milk produced after one month
B. Formula supplementation
C. ✅✅ The first milk rich in antibodies and immune factors
D. Milk produced only after pumping
Answer: ✅✅ C. The first milk rich in antibodies and immune factors
Rationale: Colostrum is produced during late pregnancy and the first few days postpartum. It is
rich in immunoglobulins (especially IgA), leukocytes, and growth factors.
5. Which immunoglobulin is most abundant in human breast milk?
A. IgG
B. ✅✅ Secretory IgA
C. IgM
D. IgE
Answer: ✅✅ B. Secretory IgA
Rationale: Secretory IgA provides localized protection of the infant's gastrointestinal and
respiratory mucosa against pathogens.
6. Which feeding cue is considered an early hunger sign?
A. Crying loudly
B. ✅✅ Rooting and bringing hands to the mouth
C. Sleeping deeply
D. Hiccupping
Answer: ✅✅ B. Rooting and bringing hands to the mouth
Rationale: Early feeding cues include rooting, hand-to-mouth movements, sucking motions, and
increased alertness. Crying is considered a late hunger cue.
, CLC-Certified Lactation Counselor Practice Exam
7. Which positioning sign indicates a good latch?
A. Lips tucked inward
B. ✅✅ Lips flanged outward with a wide mouth opening
C. Only the nipple is inside the mouth
D. Clicking sounds during feeding
Answer: ✅✅ B. Lips flanged outward with a wide mouth opening
Rationale: A deep latch minimizes nipple pain and allows effective milk transfer.
8. Which statement about demand feeding is correct?
A. Feed every 6 hours regardless of cues.
B. Feed only when the baby cries.
C. ✅✅ Feed whenever the infant shows feeding cues.
D. Feed on a strict 4-hour schedule.
Answer: ✅✅ C. Feed whenever the infant shows feeding cues.
Rationale: Responsive feeding supports adequate intake, milk production, and infant growth.
9. Which finding suggests effective breastfeeding?
A. Persistent nipple pain throughout the feeding
B. Infant falls asleep immediately without swallowing
C. ✅✅ Audible swallowing and rhythmic sucking
D. Infant feeds for only one minute
Answer: ✅✅ C. Audible swallowing and rhythmic sucking
Rationale: Rhythmic sucking with audible swallowing indicates effective milk transfer.
10. During the first few days after birth, a healthy newborn typically feeds:
A. 3–4 times daily
B. 5–6 times daily
, CLC-Certified Lactation Counselor Practice Exam
C. ✅✅ 8–12 times in 24 hours
D. Every 8 hours
Answer: ✅✅ C. 8–12 times in 24 hours
Rationale: Frequent feeding establishes milk supply and supports adequate infant nutrition.
11. Which vitamin is routinely recommended for exclusively breastfed infants in
many countries?
A. Vitamin A
B. Vitamin C
C. ✅✅ Vitamin D
D. Vitamin K after the newborn period
Answer: ✅✅ C. Vitamin D
Rationale: Breast milk is the optimal source of nutrition, but vitamin D supplementation is
commonly recommended for exclusively breastfed infants according to many national
guidelines.
12. What is the primary mechanism regulating ongoing milk production?
A. Maternal age
B. Infant birth weight
C. ✅✅ Milk removal from the breast (supply and demand)
D. Maternal height
Answer: ✅✅ C. Milk removal from the breast (supply and demand)
Rationale: Frequent and effective milk removal stimulates continued milk production.
13. A mother reports mild breast fullness on postpartum day 3. What is the most
appropriate recommendation?
A. Stop breastfeeding for 24 hours.
B. Limit feedings to every 6 hours.
C. ✅✅ Encourage frequent, effective breastfeeding.
D. Switch to formula.
2026 CLC- Certified Lactation Counselor
Practice Exam Questions and Answers
with Rationales
1. Which hormone is primarily responsible for milk production?
A. Oxytocin
B. ✅✅ Prolactin
C. Estrogen
D. Progesterone
Answer: ✅✅ B. Prolactin
Rationale: Prolactin stimulates milk synthesis in the alveolar cells of the breast. Oxytocin is
responsible for milk ejection (let-down), while estrogen and progesterone support breast
development during pregnancy but inhibit abundant milk production until after birth.
2. Which hormone is responsible for the milk ejection (let-down) reflex?
A. Prolactin
B. ✅✅ Oxytocin
C. Cortisol
D. Human growth hormone
Answer: ✅✅ B. Oxytocin
Rationale: Oxytocin causes the myoepithelial cells surrounding the milk-producing alveoli to
contract, pushing milk into the ducts where it can be removed by the infant.
3. A healthy full-term newborn should ideally begin breastfeeding:
A. Within 12 hours after birth
B. Within 6 hours after birth
C. ✅✅ Within the first hour after birth
D. After the mother produces mature milk
Answer: ✅✅ C. Within the first hour after birth
, CLC-Certified Lactation Counselor Practice Exam
Rationale: Early initiation of breastfeeding promotes skin-to-skin contact, stimulates milk
production, improves infant temperature regulation, and increases breastfeeding success.
4. Colostrum is best described as:
A. Mature milk produced after one month
B. Formula supplementation
C. ✅✅ The first milk rich in antibodies and immune factors
D. Milk produced only after pumping
Answer: ✅✅ C. The first milk rich in antibodies and immune factors
Rationale: Colostrum is produced during late pregnancy and the first few days postpartum. It is
rich in immunoglobulins (especially IgA), leukocytes, and growth factors.
5. Which immunoglobulin is most abundant in human breast milk?
A. IgG
B. ✅✅ Secretory IgA
C. IgM
D. IgE
Answer: ✅✅ B. Secretory IgA
Rationale: Secretory IgA provides localized protection of the infant's gastrointestinal and
respiratory mucosa against pathogens.
6. Which feeding cue is considered an early hunger sign?
A. Crying loudly
B. ✅✅ Rooting and bringing hands to the mouth
C. Sleeping deeply
D. Hiccupping
Answer: ✅✅ B. Rooting and bringing hands to the mouth
Rationale: Early feeding cues include rooting, hand-to-mouth movements, sucking motions, and
increased alertness. Crying is considered a late hunger cue.
, CLC-Certified Lactation Counselor Practice Exam
7. Which positioning sign indicates a good latch?
A. Lips tucked inward
B. ✅✅ Lips flanged outward with a wide mouth opening
C. Only the nipple is inside the mouth
D. Clicking sounds during feeding
Answer: ✅✅ B. Lips flanged outward with a wide mouth opening
Rationale: A deep latch minimizes nipple pain and allows effective milk transfer.
8. Which statement about demand feeding is correct?
A. Feed every 6 hours regardless of cues.
B. Feed only when the baby cries.
C. ✅✅ Feed whenever the infant shows feeding cues.
D. Feed on a strict 4-hour schedule.
Answer: ✅✅ C. Feed whenever the infant shows feeding cues.
Rationale: Responsive feeding supports adequate intake, milk production, and infant growth.
9. Which finding suggests effective breastfeeding?
A. Persistent nipple pain throughout the feeding
B. Infant falls asleep immediately without swallowing
C. ✅✅ Audible swallowing and rhythmic sucking
D. Infant feeds for only one minute
Answer: ✅✅ C. Audible swallowing and rhythmic sucking
Rationale: Rhythmic sucking with audible swallowing indicates effective milk transfer.
10. During the first few days after birth, a healthy newborn typically feeds:
A. 3–4 times daily
B. 5–6 times daily
, CLC-Certified Lactation Counselor Practice Exam
C. ✅✅ 8–12 times in 24 hours
D. Every 8 hours
Answer: ✅✅ C. 8–12 times in 24 hours
Rationale: Frequent feeding establishes milk supply and supports adequate infant nutrition.
11. Which vitamin is routinely recommended for exclusively breastfed infants in
many countries?
A. Vitamin A
B. Vitamin C
C. ✅✅ Vitamin D
D. Vitamin K after the newborn period
Answer: ✅✅ C. Vitamin D
Rationale: Breast milk is the optimal source of nutrition, but vitamin D supplementation is
commonly recommended for exclusively breastfed infants according to many national
guidelines.
12. What is the primary mechanism regulating ongoing milk production?
A. Maternal age
B. Infant birth weight
C. ✅✅ Milk removal from the breast (supply and demand)
D. Maternal height
Answer: ✅✅ C. Milk removal from the breast (supply and demand)
Rationale: Frequent and effective milk removal stimulates continued milk production.
13. A mother reports mild breast fullness on postpartum day 3. What is the most
appropriate recommendation?
A. Stop breastfeeding for 24 hours.
B. Limit feedings to every 6 hours.
C. ✅✅ Encourage frequent, effective breastfeeding.
D. Switch to formula.
