IBCLC Exam #1 |2025 Update |Complete Exam Set Questions And Verified Answers (solutions) | Get It
100% Accurate!!| Already Passed A+
What week gestation does the breast begin to develop in utero? - correct answer *4th* week
of gestation
Where does the primitive milk streak develop - correct answer Bilaterally from the axilla to the
groin
By the 5th week gestation the milk streak becomes what? - correct answer Mammary Milk
Ridge (or milk line)
Thickening and inward growth into the chest wall continues during what weeks gestation? -
correct answer *7-8* weeks gestation
Between weeks 12 and 16 gestation specialized cells differentiate into what? - correct answer
Smooth muscles of the nipple and areola
What forms the mammary pit? - correct answer Lactiferous ducts and their branches open into
a shallow epithelial depression
What failure creates an inverted nipple? - correct answer When the Mammary pit fails to
elevate
What is witches milk? - correct answer After birth, a neonate's mammary tissue (under the
influence of maternal hormones) might recreate colostral like fluid
At what age do the primary and secondary ducts grow and divide and form the terminal end
buds that become the alveoli? - correct answer 10-12 years old (puberty)
When does *complete* development of mammary function occur? - correct answer During
pregnancy
What is superficial fiscia? - correct answer Fibrous tissue beneath the skin
Where is the breast located? - correct answer In the superficial fascia between the *2nd rib and
6th ICS*
What are the two major divisions of the breast? - correct answer Parenchyma and Stroma
What makes up the Parenchyma? - correct answer Ducts, lobes, and aveoli
What are alveoli? - correct answer Small sacs where milk is secreted
What makes up the Stroma? - correct answer Connective and fat tissue, blood vessels, nerves,
and lymphatics.
What is Cooper's Ligament? - correct answer Suspensory ligament that are the fibrous
connections between the inner side of the breast skin and pectoral muscles. Help to shape the
breasts
,IBCLC Exam #1 |2025 Update |Complete Exam Set Questions And Verified Answers (solutions) | Get It
100% Accurate!!| Already Passed A+
What does the nipple contain? - correct answer 15-25 milk ducts, smooth muscle fibers,
sebaceous and apocrine sweat glands, and dense innervations of sensory nerve endings
How many milk ducts does the nipple contain? - correct answer 15-25
What are Montgomery Tubercles? - correct answer Sebaceous glands in the areola surrounding
the nipple
What do the Montgomery Tubercles secrete? - correct answer *Oily secretions* (lipoid fluid) to
keep the areola and the nipple lubricated and protected
What 2 arteries supply blood to the breast (60% / 30%)? - correct answer Internal mammary
artery (60%) and lateral thoracic artery (30%)
Where does the lymphatic system of the breast drain excess fluids from tissue space, bacteria
and cast off cells? - correct answer Auxiliary lymph node
Where do the nerves of the breast branch from? - correct answer 4th, 5th, and 6th intercostal
nerve
What nerve supplies the greatest amount of *sensation* to the areola? - correct answer *4th*
intercostal nerve
What part of the breast is most sensitive? - correct answer The areola followed by the general
skin of the breast, and then the nipple which is least sensitive.
What percent of breast milk is *carbohydrates*? - correct answer Approximately 7%
What are the six infant behavioral "states" - correct answer *Crying*
*Active alert*=fussy
*Quiet alert*=ready to play
*Drowsy*= irreg. breathing, heavy eyes
*Active sleep*= eye movement under lids, twitching
*Quiet sleep*= reg resp. relaxed, diff. to wake
Milk components that protect the infant/lactating breast actively bind ______, preventing their
passage through the permeable infant _____ _____ - correct answer pathogens
gut mucosa
How does the infant get the antibodies produced by mom? - correct answer antibodies are
produced in moms blood, targeted *SIgA* which is transported across the mammary secretory
cells and released in the milk.
, IBCLC Exam #1 |2025 Update |Complete Exam Set Questions And Verified Answers (solutions) | Get It
100% Accurate!!| Already Passed A+
What is sIgA? - correct answer Immunoglobulin A is an antibody that coats mucosal surfaces to
prevent adherence and penetration by pathogens
What are the most common food allergies? - correct answer 1. Cow's milk protein
2. Eggs
3. Peanuts
4. Tree nuts
5. Fish
6. Shellfish
7. Soy
8. Wheat
What are the common symptoms of food allergies? - correct answer 1. Eczema
2. Hives
3. Digestive or respiratory problems (e.g. mucus or blood in the stool)
The infant uses their _____ to draw in the nipple and ____ it in the mouth - correct answer Lips
Stabilize
Weak lip tone is also called? - correct answer *Hypotonic lips* result in the inability to seal lips
around the breast impacting the amount of suction created
What is a sucking blister? What are 2 things it can be caused by? - correct answer friction
abrasions resulting from *retracted lips or a labial frenulum* that restricts the lips from flanging
What does weak lip tone look like? - correct answer Milk spilling, smacking sound (breaking
suction), infant tires faster due to increased work of the feedings even though they aren't
efficient feedings
Things to look for when assessing the lips: - correct answer Seal
Tone
Stretchy labial frenulum
No breaks in suction
No milk spilling
What do fat deposits in the cheeks help provide? - correct answer *structural support* to
stabilize nipple in the mouth
100% Accurate!!| Already Passed A+
What week gestation does the breast begin to develop in utero? - correct answer *4th* week
of gestation
Where does the primitive milk streak develop - correct answer Bilaterally from the axilla to the
groin
By the 5th week gestation the milk streak becomes what? - correct answer Mammary Milk
Ridge (or milk line)
Thickening and inward growth into the chest wall continues during what weeks gestation? -
correct answer *7-8* weeks gestation
Between weeks 12 and 16 gestation specialized cells differentiate into what? - correct answer
Smooth muscles of the nipple and areola
What forms the mammary pit? - correct answer Lactiferous ducts and their branches open into
a shallow epithelial depression
What failure creates an inverted nipple? - correct answer When the Mammary pit fails to
elevate
What is witches milk? - correct answer After birth, a neonate's mammary tissue (under the
influence of maternal hormones) might recreate colostral like fluid
At what age do the primary and secondary ducts grow and divide and form the terminal end
buds that become the alveoli? - correct answer 10-12 years old (puberty)
When does *complete* development of mammary function occur? - correct answer During
pregnancy
What is superficial fiscia? - correct answer Fibrous tissue beneath the skin
Where is the breast located? - correct answer In the superficial fascia between the *2nd rib and
6th ICS*
What are the two major divisions of the breast? - correct answer Parenchyma and Stroma
What makes up the Parenchyma? - correct answer Ducts, lobes, and aveoli
What are alveoli? - correct answer Small sacs where milk is secreted
What makes up the Stroma? - correct answer Connective and fat tissue, blood vessels, nerves,
and lymphatics.
What is Cooper's Ligament? - correct answer Suspensory ligament that are the fibrous
connections between the inner side of the breast skin and pectoral muscles. Help to shape the
breasts
,IBCLC Exam #1 |2025 Update |Complete Exam Set Questions And Verified Answers (solutions) | Get It
100% Accurate!!| Already Passed A+
What does the nipple contain? - correct answer 15-25 milk ducts, smooth muscle fibers,
sebaceous and apocrine sweat glands, and dense innervations of sensory nerve endings
How many milk ducts does the nipple contain? - correct answer 15-25
What are Montgomery Tubercles? - correct answer Sebaceous glands in the areola surrounding
the nipple
What do the Montgomery Tubercles secrete? - correct answer *Oily secretions* (lipoid fluid) to
keep the areola and the nipple lubricated and protected
What 2 arteries supply blood to the breast (60% / 30%)? - correct answer Internal mammary
artery (60%) and lateral thoracic artery (30%)
Where does the lymphatic system of the breast drain excess fluids from tissue space, bacteria
and cast off cells? - correct answer Auxiliary lymph node
Where do the nerves of the breast branch from? - correct answer 4th, 5th, and 6th intercostal
nerve
What nerve supplies the greatest amount of *sensation* to the areola? - correct answer *4th*
intercostal nerve
What part of the breast is most sensitive? - correct answer The areola followed by the general
skin of the breast, and then the nipple which is least sensitive.
What percent of breast milk is *carbohydrates*? - correct answer Approximately 7%
What are the six infant behavioral "states" - correct answer *Crying*
*Active alert*=fussy
*Quiet alert*=ready to play
*Drowsy*= irreg. breathing, heavy eyes
*Active sleep*= eye movement under lids, twitching
*Quiet sleep*= reg resp. relaxed, diff. to wake
Milk components that protect the infant/lactating breast actively bind ______, preventing their
passage through the permeable infant _____ _____ - correct answer pathogens
gut mucosa
How does the infant get the antibodies produced by mom? - correct answer antibodies are
produced in moms blood, targeted *SIgA* which is transported across the mammary secretory
cells and released in the milk.
, IBCLC Exam #1 |2025 Update |Complete Exam Set Questions And Verified Answers (solutions) | Get It
100% Accurate!!| Already Passed A+
What is sIgA? - correct answer Immunoglobulin A is an antibody that coats mucosal surfaces to
prevent adherence and penetration by pathogens
What are the most common food allergies? - correct answer 1. Cow's milk protein
2. Eggs
3. Peanuts
4. Tree nuts
5. Fish
6. Shellfish
7. Soy
8. Wheat
What are the common symptoms of food allergies? - correct answer 1. Eczema
2. Hives
3. Digestive or respiratory problems (e.g. mucus or blood in the stool)
The infant uses their _____ to draw in the nipple and ____ it in the mouth - correct answer Lips
Stabilize
Weak lip tone is also called? - correct answer *Hypotonic lips* result in the inability to seal lips
around the breast impacting the amount of suction created
What is a sucking blister? What are 2 things it can be caused by? - correct answer friction
abrasions resulting from *retracted lips or a labial frenulum* that restricts the lips from flanging
What does weak lip tone look like? - correct answer Milk spilling, smacking sound (breaking
suction), infant tires faster due to increased work of the feedings even though they aren't
efficient feedings
Things to look for when assessing the lips: - correct answer Seal
Tone
Stretchy labial frenulum
No breaks in suction
No milk spilling
What do fat deposits in the cheeks help provide? - correct answer *structural support* to
stabilize nipple in the mouth
