IBCLC - Certification Maternal and Infant Pathology Questions and Answers 1 — Questions and Answers
Question 1: A mother who experienced a severe postpartum hemorrhage is seen on day 5 postpartum. She reports extreme fatigue and a complete failure of her milk to 'come in', despite frequent nursing attempts by a well-latching infant. Which of the following maternal conditions is the most likely cause of her lactation failure?
- Polycystic Ovary Syndrome (PCOS)
- Sheehan's Syndrome (Correct answer)
- Postpartum thyroiditis
- Retained placental fragments
Correct answer: Sheehan's Syndrome
Sheehan's Syndrome is necrosis of the pituitary gland caused by severe blood loss and hypovolemic shock during or after childbirth. This damage can lead to hypopituitarism, where the pituitary fails to produce adequate hormones, including prolactin, which is essential for lactation. The primary initial symptom is often a failure to lactate (agalactorrhea).
Question 2: A 5-day-old, exclusively breastfed infant presents with lethargy, vomiting, jaundice, and poor weight gain since birth. The mother reports the infant was feeding well initially but is now refusing the breast. These symptoms are most indicative of which rare metabolic disorder where breastfeeding is contraindicated?
- Phenylketonuria (PKU)
- Congenital Hypothyroidism
- Galactosemia (Correct answer)
- Cystic Fibrosis
Correct answer: Galactosemia
Galactosemia is an inherited metabolic disorder where the body cannot properly digest galactose, a sugar found in milk (including breast milk). Symptoms appear within a few days of initiating milk feedings and include vomiting, jaundice, lethargy, and failure to thrive. If untreated, it can lead to severe liver damage, cataracts, and brain damage; therefore, breastfeeding is contraindicated.
Question 3: A breastfeeding mother is diagnosed with infectious mastitis. Which of the following microorganisms is the most common causative agent?
- Staphylococcus aureus (Correct answer)
- Candida albicans
- Escherichia coli
- Group B Streptococcus
Correct answer: Staphylococcus aureus
Staphylococcus aureus is the bacterium most commonly responsible for infectious mastitis. It is often found on the skin and can enter the breast through a crack or fissure in the nipple, leading to infection within the mammary ducts.
Question 4: An IBCLC is called to assess a 1-day-old (20 hours) infant who appears visibly jaundiced. Which of the following is the most critical factor that distinguishes this as a potentially pathologic, rather than physiologic, situation?
- The infant is exclusively breastfed.
- The mother has a different blood type than the infant.
- The jaundice appeared within the first 24 hours of life. (Correct answer)
- The total serum bilirubin level is 6 mg/dL.
Correct answer: The jaundice appeared within the first 24 hours of life.
Jaundice that appears within the first 24 hours of life is considered pathologic until proven otherwise and requires immediate medical evaluation. Physiologic jaundice typically does not appear until after 24 hours of age, usually peaking between days 3 and 5.
Question 5: A mother at 12 days postpartum reports a sudden decrease in milk supply accompanied by an unexpected return of heavy, bright red vaginal bleeding. Which condition should be suspected as the underlying cause?
- Postpartum depression
- Mammary dysbiosis
- The normal return of menses
- Retained placental fragments (Correct answer)
Correct answer: Retained placental fragments
Retained placental fragments can cause secondary postpartum hemorrhage (late-onset heavy bleeding) and can also suppress lactation. The fragments continue to secrete progesterone, which inhibits prolactin from binding to its receptors in the breast, thereby interfering with lactogenesis II (the onset of copious milk production).
Question 6: A newborn is having significant difficulty breastfeeding, demonstrating a weak suck, inability to create a seal, and frequent nasal regurgitation of milk. The mother notes a clicking sound during feeding attempts. These signs are most characteristic of which infant anatomical variation?
- Micrognathia
- Ankyloglossia
- Cleft palate (Correct answer)
- Laryngomalacia
Correct answer: Cleft palate
A cleft palate creates an opening between the oral and nasal cavities, making it impossible for the infant to generate the negative pressure (suction) required to effectively remove milk from the breast. This leads to a poor seal, clicking sounds, and milk leaking from the nose (nasal regurgitation).
IBCLC - Certification Maternal and Infant Pathology Questions and Answers 1
A mother who experienced a severe postpartum hemorrhage is seen on day 5 postpartum.
She reports extreme fatigue and a complete failure of her milk to 'come in', despite frequent nursing attempts by a well-latching infant.
Which of the following maternal conditions is the most likely cause of her lactation failure?