Please check these resources below:
National Catholic Bioethics Center
Fr. Tad Official Website for Bioethics Q&A
Guidelines for Catholic Couples.pdf
The Apostolate of Hannah's Tears
We offer prayer support and comfort to the brokenhearted who suffer the pains of infertility at any stage of life, difficult pregnancy, miscarriage, stillbirth, the loss of a child and the adoption process.
The Apostolate of Hannah's Tears 
Pingback: Fertility Guidelines | The Apostolate of Hannah's Tears