ALPP CLC Exam Study Guide | Certified Lactation
Counselor Questions & Answers
INTRODUCTION
This comprehensive study guide features verified multiple-choice
questions for the ALPP Certified Lactation Counselor (CLC) Exam, covering
all key domains including lactation physiology, breastfeeding management,
maternal-infant assessment, milk composition, counseling skills, public
health policy, and professional ethics . Each question includes the correct
answer in bold italics with a detailed rationale explaining the underlying
science and clinical application, following current WHO, UNICEF, and AAP
guidelines . Based on the latest 2026/2027 ALPP exam content standards,
this resource is designed for nurses, midwives, doulas, childbirth
educators, and healthcare professionals seeking CLC certification through
the Academy of Lactation Policy and Practice, with a 90% passing score.
Question 1
The primary hormone responsible for milk production is:
A) Oxytocin
B) Estrogen
C) Prolactin
D) Progesterone
,Answer: C) Prolactin
Explanation: Prolactin is the primary hormone responsible for milk
production, secreted by the anterior pituitary gland to stimulate alveolar
cells to produce milk . Prolactin levels rise during a nursing session in
response to nipple stimulation and fall between feeds, helping maintain
adequate milk production over time . Oxytocin is responsible for milk
ejection, not production.**
Question 2
Oxytocin plays a major role in:
A) Milk synthesis
B) Milk ejection (let-down)
C) Breast development
D) Infant digestion
Answer: B) Milk ejection (let-down)
Explanation: Oxytocin is released from the posterior pituitary in
response to nipple stimulation and suckling. It causes myoepithelial cells
around the alveoli to contract and eject milk from the alveoli through the
ductal system . Stress, pain, or anxiety can inhibit oxytocin release and
interfere with let-down .**
Question 3
,Colostrum is best described as:
A) Mature milk
B) Transitional milk
C) Thick, antibody-rich early milk
D) Formula substitute
Answer: C) Thick, antibody-rich early milk
Explanation: Colostrum is the first milk produced in late pregnancy and
the first few days postpartum. It is thick, yellowish, and rich in antibodies
(especially IgA), proteins, and vitamins, while being lower in fat and
carbohydrates compared to mature milk . Colostrum provides essential
immune protection to the newborn.**
Question 4
Which hormone suppresses lactation during pregnancy?
A) Prolactin
B) Oxytocin
C) Progesterone
D) Estrogen
Answer: C) Progesterone
Explanation: High levels of progesterone produced by the placenta during
pregnancy suppress the full activation of milk production, even though
mammary glands are capable of producing colostrum (lactogenesis I).
, Following delivery of the placenta, progesterone levels drop rapidly,
triggering lactogenesis II .**
Question 5
What triggers the onset of lactogenesis II (secretory activation)?
A) Infant suckling for the first time
B) A rapid drop in progesterone after delivery of the placenta
C) Peak prolactin levels during the first week postpartum
D) Maternal consumption of galactagogues
Answer: B) A rapid drop in progesterone after delivery of the
placenta
Explanation: Lactogenesis II is triggered by the rapid drop in
progesterone following delivery of the placenta. This removal of inhibition
allows prolactin to stimulate alveolar cells to begin copious milk
production. Lactogenesis II typically occurs between 30-72 hours
postpartum and is often felt as "milk coming in" .**
Question 6
The functional milk-secreting units of the breast are:
A) Lactiferous sinuses
B) Ductules
Counselor Questions & Answers
INTRODUCTION
This comprehensive study guide features verified multiple-choice
questions for the ALPP Certified Lactation Counselor (CLC) Exam, covering
all key domains including lactation physiology, breastfeeding management,
maternal-infant assessment, milk composition, counseling skills, public
health policy, and professional ethics . Each question includes the correct
answer in bold italics with a detailed rationale explaining the underlying
science and clinical application, following current WHO, UNICEF, and AAP
guidelines . Based on the latest 2026/2027 ALPP exam content standards,
this resource is designed for nurses, midwives, doulas, childbirth
educators, and healthcare professionals seeking CLC certification through
the Academy of Lactation Policy and Practice, with a 90% passing score.
Question 1
The primary hormone responsible for milk production is:
A) Oxytocin
B) Estrogen
C) Prolactin
D) Progesterone
,Answer: C) Prolactin
Explanation: Prolactin is the primary hormone responsible for milk
production, secreted by the anterior pituitary gland to stimulate alveolar
cells to produce milk . Prolactin levels rise during a nursing session in
response to nipple stimulation and fall between feeds, helping maintain
adequate milk production over time . Oxytocin is responsible for milk
ejection, not production.**
Question 2
Oxytocin plays a major role in:
A) Milk synthesis
B) Milk ejection (let-down)
C) Breast development
D) Infant digestion
Answer: B) Milk ejection (let-down)
Explanation: Oxytocin is released from the posterior pituitary in
response to nipple stimulation and suckling. It causes myoepithelial cells
around the alveoli to contract and eject milk from the alveoli through the
ductal system . Stress, pain, or anxiety can inhibit oxytocin release and
interfere with let-down .**
Question 3
,Colostrum is best described as:
A) Mature milk
B) Transitional milk
C) Thick, antibody-rich early milk
D) Formula substitute
Answer: C) Thick, antibody-rich early milk
Explanation: Colostrum is the first milk produced in late pregnancy and
the first few days postpartum. It is thick, yellowish, and rich in antibodies
(especially IgA), proteins, and vitamins, while being lower in fat and
carbohydrates compared to mature milk . Colostrum provides essential
immune protection to the newborn.**
Question 4
Which hormone suppresses lactation during pregnancy?
A) Prolactin
B) Oxytocin
C) Progesterone
D) Estrogen
Answer: C) Progesterone
Explanation: High levels of progesterone produced by the placenta during
pregnancy suppress the full activation of milk production, even though
mammary glands are capable of producing colostrum (lactogenesis I).
, Following delivery of the placenta, progesterone levels drop rapidly,
triggering lactogenesis II .**
Question 5
What triggers the onset of lactogenesis II (secretory activation)?
A) Infant suckling for the first time
B) A rapid drop in progesterone after delivery of the placenta
C) Peak prolactin levels during the first week postpartum
D) Maternal consumption of galactagogues
Answer: B) A rapid drop in progesterone after delivery of the
placenta
Explanation: Lactogenesis II is triggered by the rapid drop in
progesterone following delivery of the placenta. This removal of inhibition
allows prolactin to stimulate alveolar cells to begin copious milk
production. Lactogenesis II typically occurs between 30-72 hours
postpartum and is often felt as "milk coming in" .**
Question 6
The functional milk-secreting units of the breast are:
A) Lactiferous sinuses
B) Ductules
