No, a person cannot be born with post-traumatic stress disorder (PTSD). PTSD is a mental health disorder that develops in some people who have experienced a shocking, scary, or dangerous event. It's not possible for a newborn to have experienced such an event and, therefore, they cannot be born with PTSD.
However, children can be affected by trauma experienced in utero or during birth, such as severe maternal stress, drug exposure, or a traumatic birth experience. These early life stressors can potentially impact a child's development and mental health, and might increase their vulnerability to mental health issues later in life, but it would not be diagnosed as PTSD at birth.
Children and even infants can develop a version of PTSD, often referred to as developmental trauma or complex trauma, if they are exposed to significant traumatic events, chronic abuse, or neglect. Symptoms can be different than those in adults with PTSD, and the diagnosis might not be recognized or given until later in life when the child is better able to articulate their experiences.
It's important to consult with a healthcare professional if you believe a child may be dealing with the after-effects of trauma. Early intervention and treatment can be very effective in mitigating the potential negative impacts of these experiences.