Female birth

Regarding births, Allah mentions female before male child but then in the next verse about twin births He first mentions males even though it seems female twin births are more common.

To Allah belongs the dominion of the heavens and the earth; He creates what he wills. He gives to whom He wills female [children], and He gives to whom He wills males. Or He makes them [both] males and females, and He renders whom He wills barren. Indeed, He is Knowing and Competent. [Surah Shuraa : 49-50]

Not sure if anyone fully understand these verses.