No... I mean babies are individuals and some babies sleep through from a very young age (under 12 weeks) and some start later. Our 2 1/2 yr old has slept through a handful of times... okay maybe around 12 times in her life. Jovie our 12 week old (almost) has slept through twice. They are all different and develop differently.

When Matilda was 12 weeks she was just starting to sleep more at night & went from waking every 2 hours to every 3. HTH!