My mom doesn't remember my older sisters or my birth stats at all. Time, gestation, weight, length...none of it. Just our birthdays! Although one year she said "I can't believe you'll finally be 18!" the day before my 19th birthday.
She remembers my younger sister's but she was a 27 week preemie. I even remember how much she weighed at birth. So that's a little different.

I'm not saying anything against my mom (heck, she had 3 kids and worked full time and it's been 25 years), but I can't ever imagine not remembering that T was born on Feb 21st at 8:35pm at exactly 40 weeks and weight 8lbs 9oz and was 20.5 inches long. Haha

Do you think you'll always remember?