CLC EXAM TEST BANK 2025 CERTIFIED LACTATION
CONSULTANT EXAM QUESTIONS AND CORRECT ANSWERS
This test bank covers key domains: Anatomy & Physiology,
Pharmacology, Milk Composition, Latch & Positioning, High-
Risk Infants, Maternal Conditions, Ethics, and Counseling.
Section 1: Anatomy, Physiology, & Endocrinology (Questions 1-15)
1. A new mother asks why her breasts feel fuller and heavier on day 3 postpartum. What physiologic
process explains this?
A) Prolactin stimulating alveolar cell division
B) The transition from endocrine to autocrine control
C) Increased mammary blood flow and interstitial edema prior to copious milk production
D) Complete emptying of the breast by the infant
Correct Answer: C
Rationale: The “coming in” of milk (Secretory Activation Phase II) involves a surge of blood flow,
lymphatic drainage, and interstitial fluid (edema) as lactose and citrate pull water into the alveoli. This
occurs regardless of breastfeeding frequency, though frequent removal helps manage the edema.
2. Prolactin levels are highest in the mother during which time frame?
A) Immediately before a feeding
B) During the feeding
C) Approximately 30–45 minutes after the feeding begins
D) During sleep cycles only
Correct Answer: C
Rationale: Prolactin is released from the anterior pituitary in response to nipple stretching and suckling.
Peak levels occur about 30–45 minutes after the start of stimulation, which is why allowing the infant to
finish the first breast fully is important for building milk supply.
,3. A mother has flat nipples. Which structure is primarily responsible for the "tenting" or protractility
of the nipple during latch?
A) Montgomery glands
B) Lactiferous sinuses
C) Smooth muscle fibers in the areola
D) Cooper’s ligaments
Correct Answer: C
Rationale: The areola contains smooth muscle fibers that contract to cause nipple erection and
protractility. While the lactiferous sinuses store milk, the contractile tissue of the areola is key for
achieving a deep latch when nipples are flat.
4. Which of the following hormones is inhibited by high levels of cortisol and stress, thereby
negatively impacting milk supply?
A) Oxytocin
B) Progesterone
C) Human Placental Lactogen (hPL)
D) Estrogen
Correct Answer: A
Rationale: Oxytocin is responsible for the milk ejection reflex (let-down). Stress, anxiety, pain, and high
cortisol levels inhibit oxytocin release. Prolactin is usually less affected by acute stress, but without
oxytocin, the baby cannot effectively remove milk, leading to secondary low supply.
5. A mother with a breast reduction that involved free nipple grafting (FNG) is most likely to face
which physiological barrier to breastfeeding?
A) Overproduction of milk
B) Inability to achieve let-down due to nerve transection
C) Complete absence of glandular tissue
D) High levels of prolactin antagonists
Correct Answer: B
Rationale: Free nipple grafting involves severing the nerve supply and milk ducts to relocate the nipple.
While some glandular tissue may remain, the primary barrier is the lack of sensory nerve feedback to
the brain, preventing the neuroendocrine reflex required for prolactin and oxytocin release.
6. Autocrine (local) control of milk production means that:
A) The brain signals the breast to stop producing milk after 12 months.
B) Milk production is primarily driven by maternal hydration.
C) Milk synthesis is regulated by the degree of breast emptiness (FIL feedback inhibitor).
D) Progesterone levels dictate the volume of milk produced.
, Correct Answer: C
Rationale: Autocrine control occurs after secretory activation. The Feedback Inhibitor of Lactation (FIL)
is a protein in breastmilk. When milk accumulates in the breast, FIL signals the alveoli to slow
production. Frequent and effective milk removal removes FIL, allowing continued synthesis.
7. What is the role of Montgomery glands?
A) They produce milk during the colostral phase.
B) They secrete an antimicrobial, oily substance that lubricates and protects the areola.
C) They are the primary storage site for mature milk.
D) They synthesize progesterone during pregnancy.
Correct Answer: B
Rationale: Montgomery glands (tubercles) are sebaceous glands located on the areola. They secrete a
fluid that contains antimicrobial properties and acts as a lubricant, protecting the skin during nursing.
The scent of this secretion may also help guide the infant to the breast.
8. A mother is 6 weeks pregnant and currently breastfeeding her 14-month-old. She notices her milk
volume has dropped significantly. What is the primary cause?
A) The infant is self-weaning due to developmental milestones.
B) Elevated progesterone inhibits lactogenesis.
C) Prolactin levels are suppressed by hCG.
D) The mother is not consuming enough calories.
Correct Answer: B
Rationale: During pregnancy, high levels of estrogen and progesterone inhibit the action of prolactin on
the alveolar cells, often causing a decrease in milk supply. This is a hormonal process, not necessarily a
sign of weaning by the toddler.
9. The lactiferous sinuses are located:
A) Deep within the chest wall adjacent to the ribs.
B) Just behind the areola, serving as milk reservoirs.
C) In the axillary tail of Spence.
D) At the tip of the nipple.
Correct Answer: B
Rationale: The lactiferous sinuses are dilated ducts located just behind the areola. They act as
temporary storage areas for milk before it is ejected through the nipple openings. This is why
compressing the areola (not the nipple) is effective during hand expression.
10. A mother with polycystic ovary syndrome (PCOS) may experience low milk supply due to:
A) Hyperprolactinemia
B) Insufficient glandular tissue (IGT) and/or hormonal imbalances (low progesterone, high androgens)
CONSULTANT EXAM QUESTIONS AND CORRECT ANSWERS
This test bank covers key domains: Anatomy & Physiology,
Pharmacology, Milk Composition, Latch & Positioning, High-
Risk Infants, Maternal Conditions, Ethics, and Counseling.
Section 1: Anatomy, Physiology, & Endocrinology (Questions 1-15)
1. A new mother asks why her breasts feel fuller and heavier on day 3 postpartum. What physiologic
process explains this?
A) Prolactin stimulating alveolar cell division
B) The transition from endocrine to autocrine control
C) Increased mammary blood flow and interstitial edema prior to copious milk production
D) Complete emptying of the breast by the infant
Correct Answer: C
Rationale: The “coming in” of milk (Secretory Activation Phase II) involves a surge of blood flow,
lymphatic drainage, and interstitial fluid (edema) as lactose and citrate pull water into the alveoli. This
occurs regardless of breastfeeding frequency, though frequent removal helps manage the edema.
2. Prolactin levels are highest in the mother during which time frame?
A) Immediately before a feeding
B) During the feeding
C) Approximately 30–45 minutes after the feeding begins
D) During sleep cycles only
Correct Answer: C
Rationale: Prolactin is released from the anterior pituitary in response to nipple stretching and suckling.
Peak levels occur about 30–45 minutes after the start of stimulation, which is why allowing the infant to
finish the first breast fully is important for building milk supply.
,3. A mother has flat nipples. Which structure is primarily responsible for the "tenting" or protractility
of the nipple during latch?
A) Montgomery glands
B) Lactiferous sinuses
C) Smooth muscle fibers in the areola
D) Cooper’s ligaments
Correct Answer: C
Rationale: The areola contains smooth muscle fibers that contract to cause nipple erection and
protractility. While the lactiferous sinuses store milk, the contractile tissue of the areola is key for
achieving a deep latch when nipples are flat.
4. Which of the following hormones is inhibited by high levels of cortisol and stress, thereby
negatively impacting milk supply?
A) Oxytocin
B) Progesterone
C) Human Placental Lactogen (hPL)
D) Estrogen
Correct Answer: A
Rationale: Oxytocin is responsible for the milk ejection reflex (let-down). Stress, anxiety, pain, and high
cortisol levels inhibit oxytocin release. Prolactin is usually less affected by acute stress, but without
oxytocin, the baby cannot effectively remove milk, leading to secondary low supply.
5. A mother with a breast reduction that involved free nipple grafting (FNG) is most likely to face
which physiological barrier to breastfeeding?
A) Overproduction of milk
B) Inability to achieve let-down due to nerve transection
C) Complete absence of glandular tissue
D) High levels of prolactin antagonists
Correct Answer: B
Rationale: Free nipple grafting involves severing the nerve supply and milk ducts to relocate the nipple.
While some glandular tissue may remain, the primary barrier is the lack of sensory nerve feedback to
the brain, preventing the neuroendocrine reflex required for prolactin and oxytocin release.
6. Autocrine (local) control of milk production means that:
A) The brain signals the breast to stop producing milk after 12 months.
B) Milk production is primarily driven by maternal hydration.
C) Milk synthesis is regulated by the degree of breast emptiness (FIL feedback inhibitor).
D) Progesterone levels dictate the volume of milk produced.
, Correct Answer: C
Rationale: Autocrine control occurs after secretory activation. The Feedback Inhibitor of Lactation (FIL)
is a protein in breastmilk. When milk accumulates in the breast, FIL signals the alveoli to slow
production. Frequent and effective milk removal removes FIL, allowing continued synthesis.
7. What is the role of Montgomery glands?
A) They produce milk during the colostral phase.
B) They secrete an antimicrobial, oily substance that lubricates and protects the areola.
C) They are the primary storage site for mature milk.
D) They synthesize progesterone during pregnancy.
Correct Answer: B
Rationale: Montgomery glands (tubercles) are sebaceous glands located on the areola. They secrete a
fluid that contains antimicrobial properties and acts as a lubricant, protecting the skin during nursing.
The scent of this secretion may also help guide the infant to the breast.
8. A mother is 6 weeks pregnant and currently breastfeeding her 14-month-old. She notices her milk
volume has dropped significantly. What is the primary cause?
A) The infant is self-weaning due to developmental milestones.
B) Elevated progesterone inhibits lactogenesis.
C) Prolactin levels are suppressed by hCG.
D) The mother is not consuming enough calories.
Correct Answer: B
Rationale: During pregnancy, high levels of estrogen and progesterone inhibit the action of prolactin on
the alveolar cells, often causing a decrease in milk supply. This is a hormonal process, not necessarily a
sign of weaning by the toddler.
9. The lactiferous sinuses are located:
A) Deep within the chest wall adjacent to the ribs.
B) Just behind the areola, serving as milk reservoirs.
C) In the axillary tail of Spence.
D) At the tip of the nipple.
Correct Answer: B
Rationale: The lactiferous sinuses are dilated ducts located just behind the areola. They act as
temporary storage areas for milk before it is ejected through the nipple openings. This is why
compressing the areola (not the nipple) is effective during hand expression.
10. A mother with polycystic ovary syndrome (PCOS) may experience low milk supply due to:
A) Hyperprolactinemia
B) Insufficient glandular tissue (IGT) and/or hormonal imbalances (low progesterone, high androgens)
