Spermatogonial stem cells, which exist in the testicles since birth, are progenitors cells of male gametes. These cells are critical for the process of spermatogenesis, and not able to produce mature sperm cells before puberty due to their dependency of hormonal stimuli. This characteristic of the reproductive system limits the preservation of fertility only to males who are able to produce an ...

total fertility rate relates to the number of children that a woman bears in the fertility period of her life. fertility function is one of the most important health and population indicators. this indicator affects social, health, economic and cultural factors. this study is an ecological or correlative one. factors affecting total fertility rate in iran in the year 2000 are studied in this pa...

BACKGROUND AND OBJECTIVES Postnatal depression (PND) presents a puzzling phenomenon to evolutionary anthropologists as it is highly prevalent and yet detrimental to child development and maternal health. Adaptive explanations have been proposed, but have not been tested with data that directly link PND to female fertility. METHODOLOGY A survey was designed to gather complete reproductive hist...

Infertility can arise as a consequence of treatment of oncological conditions. The parallel and continued improvement in both the management of oncology and fertility cases in recent times has brought to the fore-front the potential for fertility preservation in patients being treated for cancer. Oncologists must be aware of situations where their treatment will affect fertility in patients who...

Bride Price and Fertility Decisions: Evidence from Rural Senegal This paper is the first to provide evidence about the relationship between bride price payments and fertility decisions in the African context. Remarkably, the results show that bride price payments reduce fertility pressure, with a woman reducing her number of children by 0.5 at the mean bride price. The results are robust to dif...

OBJECTIVE To examine the effects of fertility drugs on overall risk of ovarian cancer using data from a large cohort of infertile women. DESIGN Population based cohort study. SETTING Danish hospitals and private fertility clinics. PARTICIPANTS 54,362 women with infertility problems referred to all Danish fertility clinics during 1963-98. The median age at first evaluation of infertility w...

This important and timely review by Dr. Munster effectively highlights the complexity of addressing fertility-related issues and fertility preservation in young women with breast cancer. Given the lack of long-term data, we are often left with more questions than answers about determining the appropriate management of these patients. Caring for women with estrogen receptor–positive tumors and B...

This paper demonstrates that the apparently much higher Hispanic/Mexican fertility is almost exclusively the product of period estimates obtained for immigrant women and that period measures of immigrant fertility suffer from 3 serious sources of biases that together significantly overstate fertility levels: difficulties in estimating the size of immigrant groups; the tendency for migration to ...

Conditional cash transfer programs have been shown to be effective development strategies for raising human capital investments in children in many LDCs. In this paper, we use experimental data from cash transfer programs in three Latin America countries to assess the potential, unintended impact of conditional cash transfers programs on childbearing. Because cash transfer programs both affect ...

An assumption in case-control studies is that forces of selection are the same for cases and controls. This may not be true for studies of male infertility among infertility clients. Earlier reproductive outcomes may introduce modification of risk behavior or differential referral. Selection bias might also occur when infertile males are compared with fertile males. Partners of sterile men are ...