Just as the name suggests, Buy or Borrow Maternity (pay per item) allows you to shop by trimester and either buy or rent the pieces you like best. You can rent as many items as you like, paying per piece per month, and at the end of the month, you can extend your rental, return it, or buy it for a discounted price. Available items include tops, pants, skirts, dresses, jumpsuits, and even nappy bags.