How long do these leaps last for?

Does preemies also follow the leaps?
How long does active labour usually last for? When do you know that you are in active labour?
Are the leaps definite? Do every baby face them at the same period? Or it differs from baby to baby...
How do you deal with post partum depressions and how long does it usually last?
Anyone going for the spring maternity sale? Do you know how long it will last? Is it really 50%...
Epidural natural Hi moms how long do epidural usually last during natural birth? #firstmom #firsttim...
How long does "cradle cap" last? Is there anything I can do to make it go away faster?