There is no safe level of lead for a child. Even amounts that wouldn't trouble an adult cause measurable cognitive harm. Here's why — and what testing actually tells you.

Some indoor air pollutants matter more during pregnancy than any other time of life. Here's a focused testing list for the second and third trimester.

You can spend hundreds on a baby monitor and nothing on what your baby actually breathes and drinks. Here's the testing list to run while the room is still empty.