Arief R Wismansyah, mayor of Tangerang city, made the comments at a pregnancy seminar in the city's health office.
Wismansyah told the audience: "To create Indonesian children that are healthy smart and competitive, the most important thing is, from the beginning, to provide them adequate nutrition, especially breastfeeding.
He noted that many parents were too busy to feed their children anything other than canned milk or packaged foods, leading to poor health and development. "So, it's no wonder that recently there are more LGBT."
Wismansyah's comments are the latest in a slew of anti-LGBT sentiment in Indonesia, the country with the world's largest population of Muslims.