The statement that there are more girls born in Vietnam is not accurate, but the possible related factors can be summarized as follows:
(1) Historical war factors: In the past few decades, Vietnam has experienced multiple wars, resulting in a large number of male deaths on the battlefield, leading to a relatively high female population in Vietnam for a period of time after the war ended. However, this factor has gradually weakened over time and is no longer the main influencing factor of the current gender ratio in Vietnam.
(2) Differences in lifespan factors: The average lifespan of Vietnamese women is generally higher than that of men. This means that there are relatively more women in the elderly population, but it does not directly mean that there are more girls than boys at birth.
(3) The reversal of reality: In recent years, the sex ratio at birth in Vietnam has become imbalanced, with a higher proportion of male births than female births. This is mainly due to the concept of favoring sons over daughters in Vietnam, as well as some families abusing technological means to choose the gender of their fetuses. From the current sex ratio at birth, Vietnam is not having more girls, but rather an increasing proportion of male births.
The statement that there are more girls born in Vietnam is not accurate, but in recent years, the proportion of male births has been gradually increasing. For more information, it is recommended to consult relevant research reports or consult population experts.