These observations have sparked interest among researchers and psychologists, as children’s cognitive development plays a pivotal role in shaping their future.
To address these questions, experts have conducted extensive research and surveys to identify the factors influencing children’s cognitive development.

Are C-section babies or vaginally delivered babies smarter?
From a brain development perspective, a child’s intelligence is not directly linked to their birth method. Instead, cognitive development relies on multiple factors, including maternal health during pregnancy, genetics, nutrition, educational environment, and more.
There are clear medical indications for performing a C-section. For instance, if vaginal delivery poses a threat to the life of the mother or baby, or in cases such as a large fetus, abnormal fetal position, preeclampsia, or antepartum hemorrhage, a C-section is often the safer choice.
However, these decisions should be carefully evaluated by medical professionals. Choosing a C-section should be based solely on clear medical indications and not on reasons unrelated to health.
Otherwise, it may lead to unintended risks for both mother and child, causing more harm to the child’s body and health in the early years. Therefore, mothers should listen to and trust the advice of experts to ensure the best possible start for their children’s health.
Is it better to give birth during the day or at night?
Research suggests that there are notable differences between children born during the day and those born at night. The American College of Obstetricians and Gynecologists conducted a survey on the birthing processes of 429 women and found that the average length of labor for mothers who gave birth at night was approximately 40 minutes longer than those who gave birth during the day.
Longer labor durations increase health risks for mothers. Compared to daytime births, nighttime deliveries showed a 26% higher risk of birth complications, impacting both maternal health and child safety.
A mother’s health status during labor is intimately linked to the time of day. During the day, mothers tend to be in better health due to optimal support from medical staff.
In contrast, at night, many healthcare workers from different departments have finished their shifts, leaving only a small number on duty. This reduces the efficiency of medical support, and in emergency situations, performing detailed checks on the mother and child in a timely manner becomes more challenging.
Research indicates notable differences between daytime and nighttime births.
Does a child’s birth weight reflect their IQ?
Aside from birth method and timing, birth weight is another significant concern for many parents.
In reality, while a child’s birth weight is correlated with IQ, it is not the sole determinant of cognitive development. Various factors can influence weight, including maternal health, dietary habits during pregnancy, and genetics. A mother’s proper nutrition and health care during pregnancy will positively impact the child’s development.
According to the “Reference Standards for the Growth and Development of Children Under 7 Years Old in China,” the normal weight range for baby boys is approximately 2.62 to 4.12 kg, while for baby girls, it is 2.57 to 4.04 kg.
While birth weight is associated with IQ, it is not the sole factor.
Infants weighing less than 2.5 kg are typically considered premature and may require incubation for careful health monitoring. Conversely, infants weighing over 5 kg are considered macrosomic and may face health issues or complications during delivery.
Although birth weight can impact brain and body development, the most critical factor is the care and nurturing provided by parents after birth. Love, support, and a positive educational environment contribute to a child’s overall well-being and intelligence. Thus, beyond focusing on weight, timing, and birth method, parents should strive to build a solid foundation for their child’s holistic development.