, ALPP CLC ExAm – ACAdEmy of LACtAtion PoLiCy And PrACtiCE – 2026/2027
ACAdEmiC yEAr – 100 QuEstions And AnswErs for CErtifiEd LACtAtion
CounsELor CErtifiCAtion || BrAnd nEw
The following 100 questions are organized into four core domains aligned with the ALPP CLC
exam content outline. Each question includes four answer choices, the correct answer, and a
detailed rationale grounded in evidence-based lactation science and ALPP counseling
standards. The CLC exam is administered by the Academy of Lactation Policy and Practice
(ALPP), is ANSI-accredited, and consists of a 3-hour computer-based examination.
Domain 1: Development & Physiology of Lactation (Questions 1–25)
Question 1. A first-time mother asks when her body starts making milk for her baby. The
lactation counselor explains that secretory differentiation (Lactogenesis Stage I) typically begins:
• A) Immediately after the baby's first feeding
• B) Around mid-pregnancy (16–22 weeks gestation)
• C) At the moment of placental delivery
• D) During the first 24 hours postpartum
CorrECt AnswEr: B
rAtionALE: Lactogenesis Stage I (secretory differentiation) begins around mid-pregnancy (16–
22 weeks gestation) when the breasts become capable of milk secretion under the influence of
prolactin, estrogen, progesterone, and human placental lactogen. Colostrum production begins
during this stage, though high levels of progesterone inhibit full milk secretion until after
placental delivery.
Question 2. Lactogenesis Stage II (secretory activation) is triggered primarily by:
• A) Increased maternal caloric intake
• B) The sudden drop in progesterone following placental delivery
• C) Prolactin release from the anterior pituitary
• D) Infant suckling
CorrECt AnswEr: B
,rAtionALE: Lactogenesis Stage II is triggered by the abrupt withdrawal of progesterone
following delivery of the placenta. This allows prolactin to exert its full effect on milk synthesis.
While prolactin and infant suckling are important for ongoing milk production, the initial trigger
for the onset of copious milk secretion (typically 30–72 hours postpartum) is the drop in
progesterone.
Question 3. Milk ejection (the "let-down" reflex) is mediated by which hormone?
• A) Prolactin
• B) Estrogen
• C) Oxytocin
• D) Progesterone
CorrECt AnswEr: C
rAtionALE: Oxytocin is released from the posterior pituitary in response to nipple stimulation,
infant suckling, and even conditioned cues such as hearing a baby cry. Oxytocin causes
myoepithelial cells surrounding the alveoli to contract, ejecting milk from the alveoli into the
ductal system.
Question 4. The primary hormone responsible for milk synthesis (production) in the alveolar
cells is:
• A) Oxytocin
• B) Prolactin
• C) Estrogen
• D) Human placental lactogen
CorrECt AnswEr: B
rAtionALE: Prolactin stimulates milk synthesis in the alveolar cells of the breast. It is released
from the anterior pituitary in response to nipple stimulation and is the primary driver of
lactogenesis. Oxytocin is responsible for milk ejection, not synthesis.
Question 5. Which of the following accurately describes the role of progesterone during
pregnancy?
• A) It stimulates prolactin production
• B) It inhibits milk secretion, preventing full lactation before birth
• C) It triggers the let-down reflex
, • D) It increases milk fat content
CorrECt AnswEr: B
rAtionALE: Progesterone, along with estrogen, inhibits milk secretion during pregnancy
despite the presence of prolactin. This prevents the onset of copious milk production until after
placental delivery, when progesterone levels drop sharply.
Question 6. Colostrum differs from mature milk in which of the following ways?
• A) Colostrum has higher fat content
• B) Colostrum has higher protein content and higher immunoglobulin concentration
• C) Colostrum has higher lactose content
• D) Colostrum is lower in vitamins
CorrECt AnswEr: B
rAtionALE: Colostrum (produced during Lactogenesis I) has a higher protein content, higher
concentrations of immunoglobulins (particularly secretory IgA), and higher vitamin A content
compared to mature milk. It is lower in fat and lactose than mature milk, making it ideal for the
newborn's immature digestive system.
Question 7. The primary carbohydrate in human milk is:
• A) Sucrose
• B) Glucose
• C) Lactose
• D) Galactose
CorrECt AnswEr: C
rAtionALE: Lactose is the primary carbohydrate found in mammalian milk and is unique to
milk. Human milk contains approximately 7% lactose, which provides approximately 40% of the
calories in breast milk and supports brain development.
Question 8. The composition of human milk changes significantly:
• A) Only during the first week postpartum
• B) Within a single feeding (foremilk to hindmilk) and over the course of lactation
• C) Only when the mother is ill
• D) Only after six months postpartum
ACAdEmiC yEAr – 100 QuEstions And AnswErs for CErtifiEd LACtAtion
CounsELor CErtifiCAtion || BrAnd nEw
The following 100 questions are organized into four core domains aligned with the ALPP CLC
exam content outline. Each question includes four answer choices, the correct answer, and a
detailed rationale grounded in evidence-based lactation science and ALPP counseling
standards. The CLC exam is administered by the Academy of Lactation Policy and Practice
(ALPP), is ANSI-accredited, and consists of a 3-hour computer-based examination.
Domain 1: Development & Physiology of Lactation (Questions 1–25)
Question 1. A first-time mother asks when her body starts making milk for her baby. The
lactation counselor explains that secretory differentiation (Lactogenesis Stage I) typically begins:
• A) Immediately after the baby's first feeding
• B) Around mid-pregnancy (16–22 weeks gestation)
• C) At the moment of placental delivery
• D) During the first 24 hours postpartum
CorrECt AnswEr: B
rAtionALE: Lactogenesis Stage I (secretory differentiation) begins around mid-pregnancy (16–
22 weeks gestation) when the breasts become capable of milk secretion under the influence of
prolactin, estrogen, progesterone, and human placental lactogen. Colostrum production begins
during this stage, though high levels of progesterone inhibit full milk secretion until after
placental delivery.
Question 2. Lactogenesis Stage II (secretory activation) is triggered primarily by:
• A) Increased maternal caloric intake
• B) The sudden drop in progesterone following placental delivery
• C) Prolactin release from the anterior pituitary
• D) Infant suckling
CorrECt AnswEr: B
,rAtionALE: Lactogenesis Stage II is triggered by the abrupt withdrawal of progesterone
following delivery of the placenta. This allows prolactin to exert its full effect on milk synthesis.
While prolactin and infant suckling are important for ongoing milk production, the initial trigger
for the onset of copious milk secretion (typically 30–72 hours postpartum) is the drop in
progesterone.
Question 3. Milk ejection (the "let-down" reflex) is mediated by which hormone?
• A) Prolactin
• B) Estrogen
• C) Oxytocin
• D) Progesterone
CorrECt AnswEr: C
rAtionALE: Oxytocin is released from the posterior pituitary in response to nipple stimulation,
infant suckling, and even conditioned cues such as hearing a baby cry. Oxytocin causes
myoepithelial cells surrounding the alveoli to contract, ejecting milk from the alveoli into the
ductal system.
Question 4. The primary hormone responsible for milk synthesis (production) in the alveolar
cells is:
• A) Oxytocin
• B) Prolactin
• C) Estrogen
• D) Human placental lactogen
CorrECt AnswEr: B
rAtionALE: Prolactin stimulates milk synthesis in the alveolar cells of the breast. It is released
from the anterior pituitary in response to nipple stimulation and is the primary driver of
lactogenesis. Oxytocin is responsible for milk ejection, not synthesis.
Question 5. Which of the following accurately describes the role of progesterone during
pregnancy?
• A) It stimulates prolactin production
• B) It inhibits milk secretion, preventing full lactation before birth
• C) It triggers the let-down reflex
, • D) It increases milk fat content
CorrECt AnswEr: B
rAtionALE: Progesterone, along with estrogen, inhibits milk secretion during pregnancy
despite the presence of prolactin. This prevents the onset of copious milk production until after
placental delivery, when progesterone levels drop sharply.
Question 6. Colostrum differs from mature milk in which of the following ways?
• A) Colostrum has higher fat content
• B) Colostrum has higher protein content and higher immunoglobulin concentration
• C) Colostrum has higher lactose content
• D) Colostrum is lower in vitamins
CorrECt AnswEr: B
rAtionALE: Colostrum (produced during Lactogenesis I) has a higher protein content, higher
concentrations of immunoglobulins (particularly secretory IgA), and higher vitamin A content
compared to mature milk. It is lower in fat and lactose than mature milk, making it ideal for the
newborn's immature digestive system.
Question 7. The primary carbohydrate in human milk is:
• A) Sucrose
• B) Glucose
• C) Lactose
• D) Galactose
CorrECt AnswEr: C
rAtionALE: Lactose is the primary carbohydrate found in mammalian milk and is unique to
milk. Human milk contains approximately 7% lactose, which provides approximately 40% of the
calories in breast milk and supports brain development.
Question 8. The composition of human milk changes significantly:
• A) Only during the first week postpartum
• B) Within a single feeding (foremilk to hindmilk) and over the course of lactation
• C) Only when the mother is ill
• D) Only after six months postpartum
