OBJECTIVE: The aim of this study was to assess the correlation of spouse selection with short tandem repeats (STRs) in DNA and with the number of fingertip lunulae to investigate the role of heredity in spouse selection.
METHODS: We randomly selected a total of 286 couples (husband and wife) as a couple group while 200 paired subjects (a man randomly matched with a woman as a pair of subjects) were selected as a non-spouse group for DNA typing, and to investigate lunulae in spouse selection, a total of 554 couples were selected as a couple group and 500 pairs of subjects were selected as a control group.
RESULTS: A significant difference of STR matching number (a large value implies a higher genetic similarity) between spouse group and non-spouse group were observed (12.3 ± 2.7 vs. 11.8 ± 2.6; p < 0.05). A significant difference of the lunula matching number (difference of lunula counts between a paired subjects, a lower value implies a higher genetic similarity) between two groups were also observed for the lunula counts (1.55 ± 1.88 vs. 3.53 ± 2.40; p < 0.01).
CONCLUSIONS: Significant and unprecedented relationships were found between the couples and polymorphic STRs, and between spouse selection and lunula counts. Polymorphic STRs and fingertip lunulae counts provide an initial insight into the potentially important contributions that genetic characteristics may play a key role in spouse selection.

Marriage without meaningful consent persists in India, yet early marriage programs have rarely addressed consent, and research on the practice and its consequences for married life is limited. This study explores how consent in marriage decisions affects married life, specifically, agency, gender attitudes, spousal communication, contraception, and marital violence outcomes.
A subset of 1991 married girls and young women was drawn from a 2018 state-representative survey of adolescents and youth aged 15-21 years in Jharkhand. We compared outcomes between those in self-arranged marriages (n = 392), those in semi-arranged marriages who were acquainted with their husbands before marriage (n = 612), and those in fully parent-arranged marriages with no premarital contact (n = 995). Logistic regression analyses identify associations between marriage decision-making and outcomes of interest, controlling for confounding sociodemographic factors.
Compared with girls whose marriages were self-arranged, those in both fully parent- and semi-arranged marriages were less likely, respectively, to make household decisions (odds ratios [OR], .37 and .60), hold egalitarian gender role attitudes (OR, .48 and .66), uphold girls\' rights (OR, .41 and .48), communicate with their husbands (OR, .48 and .64), and practice contraception (OR, .51 and .67). Those in fully family-arranged marriages also had less freedom of movement (OR, .64) and were less likely to express self-efficacy (OR, .64). Marital violence was unrelated to marriage arrangements.
Self-arranged marriage is associated with more positive outcomes than family-arranged ones, including semi-arranged ones, but marriage arrangements are unrelated with marital violence. Findings reaffirm the need to breakdown prevailing patriarchal norms and promote girls\' right to meaningful, \"free and full consent\".