The nesting instinct usually begins in the final weeks of pregnancy, accompanied by a surge of energy and an uncontrollable urge to get your home in ship shape.
Give in to your inner domestic goddess: cook, clean, organize, and de-clutter, but take it easy. If you spend hours on your hands and knees scrubbing, you may find yourself in labor sooner than you'd expected. Some men develop a nesting instinct, but unfortunately this tends to be associated with cars and garden sheds. If this happens to your partner, at least you can look forward to a sparkling-clean car, spruced-up patio, and manicured lawn.
Nesting not happening for you? Pay the professionals to do a spring cleaning. Or forget it: your baby won't care whether the cupboards are clean.