QUESTION
               The Santa Cruz, California District Office asked whether Kathryn A. K~, born on March
                  13, 1995, is entitled to surviving child's insurance benefits on the record of the
                  deceased wage earner, Harold D. K~. Kathryn was allegedly naturally conceived prior
                  to Mr. K~'s death on May 1, 1994.
               
               FACTUAL BACKGROUND
               On May 1, 1994, Mr. K~ died in a drowning accident in Anacortes, Washington.
               His death certificate lists Elizabeth H~ as his wife and shows their common address
                  in Anacortes. SSA has been unable to procure a marriage certificate from Ms. H~.
               
               On March 31, 1995, Ms. H~ gave birth to Kathryn A. K~ at Island Hospital in Anacortes.
                  The number of Kathryn's father is listed on birth certificate as "none named."
               
               On August 23, 2001, Ms. H~ completed and signed a Birth Affidavit for Santa Cruz County,
                  California, where she indicated that Kathryn was born on March 31, 1995, in Anacortes.
                  Ms. H~ identified herself as Elizabeth A. K~ and identified Kathryn's father as Harold
                  D. K~.
               
               On October 9, 2002, Ms. H~ lost custody of Kathryn to Santa Cruz County Human Resources
                  due to a "substantial danger to the physical health of the child or the child is suffering
                  severe emotional damage, and there is no reasonable means by which the child's physical
                  or emotional health may be protected without removing the child from the parents'
                  or guardians' physical custody." Ms. H~ was allowed supervised visitation with Kathryn
                  twice per week. Pursuant to Ms. H~'s request, a social worker arranged for her to
                  take a drug and alcohol assessment.
               
               On November 6, 2003, Olivia R~, a foster care eligibility worker with the Santa Cruz
                  County Human Resources, completed a Social Security Form SSA-4-BK, Application for
                  Child Insurance Benefits, on behalf of Kathryn. On the form, Ms. R~ indicated that
                  Mr. K~ was the legitimate biological parent of Kathryn.
               
               Ms. H~ has regained custody of Kathryn and moved to Gilroy, California. Ms. H~ has
                  not supplied the Social Security Administration (SSA) with any evidence of Kathryn's
                  paternity, nor has she attempted to pursue the claim for child survivor's benefits
                  made by Santa Cruz County Human Resources.
               
               ANALYSIS
               A surviving child is entitled to child's insurance benefits if:
               1. The wage earner died either fully or currently insured; and
               2. The child is the child of the deceased wage earner; and
               4. The child was dependent upon the deceased wage earner; and
               5. The child is not married; and
               6. An application for child's insurance benefits is filed.
               See Social Security Act § 202(d), 42 U.S.C. § 402(d); 20 C.F.R.§ 404.350 (2004). [1] Here, the wage earner was fully insured at the time of his death. Kathryn is under
                  the age of 18, is not married, and has applied for benefits. Thus, the only issues
                  are whether Kathryn meets the second and fourth requirements above. If Kathryn meets
                  the second requirement, she is also considered dependent, which would satisfy the fourth requirement. See 20 C.F.R. § 404.361.
               
               Washington State Law
               3. The child is under the age of 18 (there are other tests forthisnot applicable here);
                  and
               
               RCW 26.26.116 states:
               (1) A man is presumed to be the father of a child if:
               (a) He and the mother of the child are married to each other and the child is born
                  during the marriage;
               
               (b) He and the mother of the child were married to each other and the child is born
                  within three hundred days after the marriage is terminated by death, annulment, dissolution
                  of marriage, legal separation, or declaration of validity;
               
               (c) Before the birth of the child, he and the mother of the child married each other
                  in apparent compliance with law, even if the attempted marriage is, or could be, declared
                  invalid and the child is born during the invalid marriage or within three hundred
                  days after its termination by death, annulment, dissolution of marriage, legal separation,
                  or declaration of invalidity….
               
               Id; see also POMS GN 00306.665. Kathryn was born on March 31, 1995. Since this is 339 days or 48.5 weeks after Mr.
                  K~ died, Mr. K~ is not presumed to be Kathryn's father under RCW 26.26.116.
               
               We also examined Washington State's intestacy law. See 20 C.F.R. § 404.355 (a)(1). RCW 11.02.005(3) states: "Posthumous children are considered
                  as living at the death of their parent." The phrase "posthumous children" refers to
                  children conceived before the death of the parent.
               
               Using May 1, 1994, the date of death of Mr. K~ for the last possible day for Ms. H~
                  to conceive, an online pregnancy calculator estimated the due date as January 23,
                  1995. [2] On February 19, 1995 (42 weeks gestation), the pregnancy calculator suggested that
                  the mother talk to her healthcare provider about a possible induction and gave no
                  information for procedure after http://www.pregnancy.org/pregnancycalendar/html_calpage.php?Date=02/01/1995&ElapsedStart=276&DueDate=01/23/1995&ConceptionDate=05/01/1994?February 1995, as it was assumed the child would already be born. [3]
               A typical gestation period is between 266 and 280 days, approximately 38 to 40 weeks.
                  See The Merck Manual, Section 18, Chapter 249 (17th ed. 1999). According to SSA's medical consultants
                  in the Center for Disability, Seattle Region, a gestation of 48.5 weeks was highly
                  unlikely due to health risks to the unborn child. Other sources agree that a gestation
                  period of this length is extremely rare and dangerous for the fetus. In fact, it is
                  suhttp://www.familyinternet.com/fisites/pregcom/03080060.htmggested that only 7-10%
                  of all infants are born at 42 weeks or later. [4] An infant is deemed "postmature" after 42 weeks of gestation. See Merck, Section 19, Chapter 260. The main problem that exists for postmature infants is
                  degeneration, called "placental insufficiency syndrome."  Id. The fetus may receive inadequate nutrients from the mother, resulting in fetal soft
                  tissue wasting, and it may develop asphyxia, meconium aspiration syndrome, and hypoglycemia.
                  Id. Due to these risks to the fetus, virtually all medical information on pregnancies
                  available recommend induction of labor or caesarean section at 41 to 42 weeks. See fn. 3. Indeed, at 43 to 44 weeks it is considered medically unsound for the mother
                  to continue with the pregnancy. See fn. 3.
               
               We found two cases in Washington State that address the gestation period. In State v. Schimschal, 437 P.2d 169, 171 (Wash. 1968), the State of Washington had advocated a jury instruction
                  stating that the extreme limit of a period of gestation is 334 days. In Pierson v. Pierson, 214 P. 159, 160 (1923), the court found that the birth of a child 336 days from
                  the time husband and wife ceased to cohabit did not conclusively show illegitimacy.
                  The case went on to suggest had there been evidence of wrongdoing by the parties or
                  evidence that intercourse had not occurred, that this would have been evidence to
                  conclude illegitimacy. Id at 159-60. We found no published case where the pregnancy lasted 339 days.
               
               Social Security Ruling (SSR) 73-28 entitled "Relationship-Presumption of Legitimacy
                  of Child Born After Death of Worker-Gestation Period" examined a specific case in
                  New Jersey where a child was born 327 days after the death of the number holder and
                  the evidence reasonably established that the worker and his widow lived together until
                  his death and the widow engaged in no extra-martial relationships during the period
                  of possible conception. The mother in this case also brought forth medical evidence
                  from her physician supporting her contentions regarding the paternity of her child.
                  Here, SSA has not received evidence of the alleged marriage. Other than the death
                  certificate showing a common address, there is no evidence that Ms. H~ and Mr. K~
                  were in fact living together at the time of his death. There is no affidavit from
                  Ms. H~ that she engaged in no extra-marital relationship during the period of possible
                  conception.
               
               In other cases, OGC recommended that SSA obtain the medical records relating to the
                  birth to determine whether they are consistent with a long gestation period. See, e.g. Memorandum from OGC Region IV to Assistant Regional Commissioner, Programs, Determination of Whether the Length of the Gestation Period Will  Permit a Finding
                     of Legitimacy-Georgia (December 12, 1984) (315-day gestation period); Memorandum from OGC Region IV to Assistant
                  Regional Commissioner, Programs, Presumption of Legitimacy (January 30, 1986) (327-day
                  gestation period); Memorandum from OGC Region IV, to Assistant Regional Commissioner,
                  Program, Whether a Gestation  Period of 306 Days Will Rebut the Presumption of Legitimacy-North
                     Carolina (September 29, 1987) (306-day gestation period). We make the same recommendation
                  here since SSA has received no medical records from Ms. H~'s prenatal care or Kathryn's
                  birth. In sum, based on the record as it currently exists, you would be justified
                  in denying the claim. However, we do suggest further development.