Assuming you’re serious - here’s what to expect:
Most sows have good maternal instincts and will do their best to raise a brood. Landrace are known for their mothering. Newborn piglets are kinda fragile, however, for their first 3 weeks of life. After that they’re pretty darn tough.
After the aforementioned 3 months, 3 weeks, 3 days (and pigs usually are very tight to that time frame, although I’m assuming you don’t have a breeding date) gestation you can expect somewhere between 5 and 15 piglets. They come out squealing and running around, and should get their first meal within an hour of birth. It’s best to let nature take its course here, if you try to push a piglet up to the teat, it will fight the pressure and things will slow down.
If you don’t have a farrowing crate it’s best to give her a large area with thick straw bedding. Piglets cool off quickly so you’ll have more survive if you provide a heat source. Don’t put a heat lamp too close to the straw, however, or else you get your BBQ early. If you make a box the piglets can get into but the sow can not with a heat source over it, probably most of the piglets will huddle up there when not nursing and will avoid being crushed by mom.
Feed mom well and she’ll make enough milk for her babies. Again, in a place mom can’t get to, have out some Starter ration that the piglets will start gumming at a very early age.
Some more pointers: If the piglets aren’t on dirt they will probably become iron deficient and would benefit from an iron shot.
Most piglets are “processed” at about 2-5 days of age. This means: getting an iron shot, getting vaccinated, getting their needle teeth clipped (these are baby canines and can tear up mom’s udder line and decrease her tolerance for being nursed), castrating the males, plus or minus docking tails and notching ears.
One final pointer - if Mom is skittish at first and won’t let babies near her - give her a six pack of Pabst Blue Ribbon. It will help her let down and she’ll pass out and allow piglets to nurse.
Good luck
