IBCLC PRACTICE TEST PAPER 2026
QUESTIONS AND SOLUTIONS GRADED A+
VERIFIED ANSWERS COMPLETE STUDY
GUIDE
⩥ By the 5th week gestation the milk streak becomes what? Answer:
Mammary Milk Ridge (or milk line)
⩥ Thickening and inward growth into the chest wall continues during
what weeks gestation? Answer: *7-8* weeks gestation
⩥ Between weeks 12 and 16 gestation specialized cells differentiate into
what? Answer: Smooth muscles of the nipple and areola
⩥ What forms the mammary pit? Answer: Lactiferous ducts and their
branches open into a shallow epithelial depression
⩥ What failure creates an inverted nipple? Answer: When the Mammary
pit fails to elevate
⩥ What is witches milk? 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? Answer: 10-12
years old (puberty)
⩥ When does *complete* development of mammary function occur?
Answer: During pregnancy
⩥ What is superficial fiscia? Answer: Fibrous tissue beneath the skin
⩥ Where is the breast located? Answer: In the superficial fascia between
the *2nd rib and 6th ICS*
⩥ What are the two major divisions of the breast? Answer: Parenchyma
and Stroma
⩥ What makes up the Parenchyma? Answer: Ducts, lobes, and aveoli
⩥ What are alveoli? Answer: Small sacs where milk is secreted
⩥ What makes up the Stroma? Answer: Connective and fat tissue, blood
vessels, nerves, and lymphatics.
,⩥ What is Cooper's Ligament? Answer: Suspensory ligament that are the
fibrous connections between the inner side of the breast skin and
pectoral muscles. Help to shape the breasts
⩥ What does the nipple contain? 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? Answer: 15-25
⩥ What are Montgomery Tubercles? Answer: Sebaceous glands in the
areola surrounding the nipple
⩥ What do the Montgomery Tubercles secrete? 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%)? 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? Answer: Auxiliary lymph
node
, ⩥ Where do the nerves of the breast branch from? Answer: 4th, 5th, and
6th intercostal nerve
⩥ What nerve supplies the greatest amount of *sensation* to the areola?
Answer: *4th* intercostal nerve
⩥ What part of the breast is most sensitive? 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*? Answer:
Approximately 7%
⩥ What are the six infant behavioral "states" 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 _____
_____ Answer: pathogens
QUESTIONS AND SOLUTIONS GRADED A+
VERIFIED ANSWERS COMPLETE STUDY
GUIDE
⩥ By the 5th week gestation the milk streak becomes what? Answer:
Mammary Milk Ridge (or milk line)
⩥ Thickening and inward growth into the chest wall continues during
what weeks gestation? Answer: *7-8* weeks gestation
⩥ Between weeks 12 and 16 gestation specialized cells differentiate into
what? Answer: Smooth muscles of the nipple and areola
⩥ What forms the mammary pit? Answer: Lactiferous ducts and their
branches open into a shallow epithelial depression
⩥ What failure creates an inverted nipple? Answer: When the Mammary
pit fails to elevate
⩥ What is witches milk? 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? Answer: 10-12
years old (puberty)
⩥ When does *complete* development of mammary function occur?
Answer: During pregnancy
⩥ What is superficial fiscia? Answer: Fibrous tissue beneath the skin
⩥ Where is the breast located? Answer: In the superficial fascia between
the *2nd rib and 6th ICS*
⩥ What are the two major divisions of the breast? Answer: Parenchyma
and Stroma
⩥ What makes up the Parenchyma? Answer: Ducts, lobes, and aveoli
⩥ What are alveoli? Answer: Small sacs where milk is secreted
⩥ What makes up the Stroma? Answer: Connective and fat tissue, blood
vessels, nerves, and lymphatics.
,⩥ What is Cooper's Ligament? Answer: Suspensory ligament that are the
fibrous connections between the inner side of the breast skin and
pectoral muscles. Help to shape the breasts
⩥ What does the nipple contain? 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? Answer: 15-25
⩥ What are Montgomery Tubercles? Answer: Sebaceous glands in the
areola surrounding the nipple
⩥ What do the Montgomery Tubercles secrete? 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%)? 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? Answer: Auxiliary lymph
node
, ⩥ Where do the nerves of the breast branch from? Answer: 4th, 5th, and
6th intercostal nerve
⩥ What nerve supplies the greatest amount of *sensation* to the areola?
Answer: *4th* intercostal nerve
⩥ What part of the breast is most sensitive? 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*? Answer:
Approximately 7%
⩥ What are the six infant behavioral "states" 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 _____
_____ Answer: pathogens
