Why Do Babies With Holoprosencephaly Struggle to Feed?

When your baby is born, feeding them is one of the most natural, deeply bonding experiences you anticipate. Hearing that it might not be safe to breastfeed or bottle-feed your baby is devastating and overwhelming. In infants with holoprosencephaly (HPE), feeding difficulties—often referred to medically as dysphagia (difficulty swallowing)—are very common. These challenges happen for two main reasons: physical changes in the structure of the face and mouth (anatomical causes), and differences in how the brain sends signals to the muscles used for feeding (neurological causes) ^[1][2].

Understanding why your baby struggles to feed safely can help you advocate for the best feeding plan to nourish them while protecting their lungs.

Anatomical Challenges: Creating a Seal and Suction

HPE frequently affects how the face and airway develop ^[3]. Many infants with HPE are born with midline craniofacial differences, such as a cleft lip or cleft palate, a small jaw, or narrowing of the nasal passages ^[1][4].

To breastfeed or bottle-feed successfully, a baby must be able to latch on tightly, create a vacuum-like suction, and pull milk from the nipple. When an infant has a cleft lip or palate, the mouth cannot form a complete seal, making it physically exhausting or impossible to generate enough suction to draw out milk ^[1]. Additionally, narrowed nasal airways can make it hard for the baby to breathe through their nose while they are latched onto a nipple, further complicating their ability to feed comfortably ^[4].

Neurological Challenges: The Suck-Swallow-Breathe Cycle

Feeding is a surprisingly complex task. It requires the brain to perfectly coordinate sucking, swallowing, and breathing—often referred to as the suck-swallow-breathe cycle. In HPE, the brain (specifically the forebrain) does not divide properly during development ^[5]. Because of this, the neural circuits that control the precise timing of the mouth, throat, and breathing muscles are often impaired ^[2].

Many infants with HPE also experience abnormal muscle tone—either hypotonia (low muscle tone, feeling “floppy”) or hypertonia (high muscle tone, feeling stiff). This lack of muscle control and coordination means that even if a baby can get milk into their mouth, their brain may not signal their throat to swallow at the exact right moment ^[2].

The Risk of Aspiration and Pneumonia

When the suck-swallow-breathe cycle is uncoordinated, milk can easily slip past the vocal cords and enter the windpipe instead of the stomach. This is known as aspiration ^[6].

Aspiration is dangerous because the lungs are designed only for air. When milk enters the lungs, it introduces bacteria and irritates the delicate lung tissue. This can lead to aspiration pneumonia, a severe lung infection that can cause acute respiratory distress ^[7][8]. In some cases, babies experience “silent aspiration,” meaning milk enters their lungs without them coughing or choking, making it invisible to the naked eye ^[9].

Feeding Evaluations and Safe Alternatives

Because clinical symptoms like coughing are not always reliable indicators of whether a baby is aspirating, your care team will likely recommend an instrumental swallow study ^[9]. The gold standard test is a Videofluoroscopic Swallow Study (VFSS). This is a specialized X-ray movie—usually conducted by a Speech-Language Pathologist (SLP) alongside a radiologist—that lets your care team see exactly where the liquid goes when your baby swallows ^[10].

Many parents wonder if specialized cleft bottles (like a Haberman feeder) can solve the feeding issues. While these bottles help bypass the anatomical suction problem, they do not fix the underlying neurological coordination problem. This is why the VFSS is so crucial. During the study, the SLP might trial specialized bottles, different nipple flow rates, or changes in positioning to see if oral feeding can be made safe ^[11].

If the VFSS shows that oral feeding is unsafe, or if your baby is burning too many calories trying to feed, your medical team will help you explore alternative feeding methods ^[12]. Most babies with severe forms of HPE will require feeding support to thrive safely ^[6].

• Nasogastric (NG) Tube: A soft tube temporarily passed through the nose and down into the stomach. This is typically used as a short-term solution while your team assesses your baby’s long-term feeding capabilities.
• Gastrostomy Tube (G-tube): A surgically placed tube that goes directly into the stomach. This is considered when long-term or permanent feeding support is needed, offering a more stable and comfortable solution.

Using a feeding tube does not mean you have failed as a parent. It means you are ensuring your baby gets the vital nutrition they need to grow, without putting their lungs at risk. You can still hold, cuddle, and bond with your baby during tube feeds, creating a nurturing environment that mirrors the closeness of traditional feeding.