Middle-age conception! I am 47 an my husband is 37. He wants another baby.?

I am afraid that all of the eggs have "dropped out of the basket", so to speak. I have regular periods and have shown no signs of menopause, but am so afraid of letting him down. We already have 6 kids (3 mine, 2 his, plus 1 together) but we both really want to try for Lucky Seven. Anyone have proven suggestions to help our chances?