One week prior to ovulation, Mom-to-be should increase her consumption of citus/acidic foods (tomatoes, oranges, lemons, etc), nuts and leafy greens like kale or spinach. Avoid greasy or oily meats (sausages, pepperoni, pork). If you aren't already, consider taking a folic acid supplement.
The day before your most fertile day, the actual day, and the day after place 3 new candles of equal size (1 blue, 1 pink, 1 white) near the bed. As you (Dad-to-be) light the blue candle, repeat the following:
"Divine Father, We call thee El, Priapus, Ing, Min and Cernunnos
You whose sheltering arms shield and comfort your young
Whose power is seen in the mighty river, the nourishing Sun
Bless this union of man and mate
As you (Mom-to-be) light the pink candle, repeat the following:
"Divine Mother, We call thee Inanna, Asherah, Freya, Vesta and Hathor
You who bears, nurtures and defends your young against all dangers
Whose power is seen in the fertile fields, the moonlit breezes
Bless this union of woman and mate
Together, you both should light the third candle and both repeat the following.
"Lord and Lady. Mother and Father. Life Divine.
As two are made one, we seek your sacred blessing
Gift us with a healthy child
One who embodies the best of us both.
Imagine a warm light filling the room as you make love. Let the candles burn until they go out on their own. Repeat with new candles for each of the remaining nights.