A population of 420 snails Biomphalaria straminea, an intermediate host of Schistosoma mansoni, received gamma-rays obtained from a 60Co source in low-doses (0/2,5/5/7,5/10/15/20 and 25 Gy); half population was kept in colonies (allowing cross fertilization) and the other half was maintained in sexual isolation (allowing self fertilization). Results showed that 15 Gy stimulates the fertility of...

Group-based lending programs for the poor have drawn much attention recently. As many of these programs target women, an important research question is whether program participation significantly changes reproductive behavior and whether the gender of the participant matters. Using survey data from 87 Bangladeshi villages, we estimate the impact of female and male participation in group-based c...

Infertility causes significant psychosocial morbidity by reducing both personal sense of wellbeing (health) and capacity to exercise self determination over reproduction (autonomy). As the primary moral responsibilities of health professionals are restoration of health and respecting patients’ autonomy, it follows that preserving fertility or treating infertility has sound ethical justification...

Within a population of F hybrids between two genotypes ( L. Group Phureja DM 1-3 516 R44 [DM] and L. Group Tuberosum RH89-039-16 [RH]) used in the potato genome sequencing project, we observed fruit set after self-pollination on many plants. Examination of pollen tube growth in self-fertile and self-unfruitful F plants after controlled self-pollinations revealed no difference in the ability of ...

STUDY QUESTION What do older women understand of the relationship between age and fertility prior and subsequent to delivering their first child? SUMMARY ANSWER Women who were first-time parents over the age of 40 did not accurately perceive the relationship between age and fertility prior to conceiving with IVF. WHAT IS KNOWN ALREADY While increases in women's age at their first birth have...

modern world is an interconnected space in which people in its different parts participate in a single common information system. the media are the main vehicles for this connectivity and can leave a strong impact on the attitudes of individuals towards aspects of family and childbearing. the media are also capable of changing the attitude of women toward the existing patterns of each culture t...

Spermatogonial stem cells (SSCs), the stem cells responsible for male fertility, are one of a small number of cells with the abilities of both self-renewal and generation of large numbers of haploid cells. Technology improvements, most importantly, transplantation assays and in vitro culture systems have greatly expanded our understanding of SSC self-renewal and differentiation. Many important ...

STUDY QUESTION What are the levels of awareness regarding female fertility and the intentions and attitudes towards parenthood among Chinese university students in Hong Kong compared with their counterparts in the West? SUMMARY ANSWER Chinese university students in Hong Kong were similarly over-optimistic about the age-related fertility decline, although they were less inclined to have childr...