(a) Consent by a married woman to assisted reproduction must be in a record signed by the woman and her husband and kept by a licensed physician. This requirement does not apply to the donation of eggs by a married woman for assisted reproduction by another woman.
(b) Failure by the husband to sign a consent required by Subsection (a) before or after the birth of the child does not preclude a finding that the husband is the father of a child born to his wife if the wife and husband openly treated the child as their own.