(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.
Official text of the Texas Family Code as published by the Texas Legislative Council.