The literature on fertility and happiness has neglected comparative analysis. We investigate the fertility/happiness association using data from the world values surveys for 86 countries. We find that, globally, happiness decreases with the number of children. This association, however, is strongly modified by individual and contextual factors. Most importantly, we find that the association bet...

BACKGROUND While recent studies have indicated that fertility has remained high in Uganda, no systematic attempt has been made to identify the factors responsible for this persistent trend and to quantify these factors. This paper uses the Uganda Demographic and Health Surveys (UDHS) of 2006 and 2011, to examine the contribution contraceptive use, marriage and postpartum infecundability on one ...

Introduction: Since the early 60s, in our lab we sought useful correlations of seminal traits and fertility in order to ultimately predict the reproductive outcome of bovine semen used in artificial breeding or the fertility of a specific male under natural service. Despite these efforts, to this day we can only account for approximately 50-60% of the variation in fertility among males by measu...

The aim of this study is to assess fertility determinants among Saudi women. A cross sectional descriptive study design was used. All data was collected through distribution via online questionnaire (twitter, facebook). Target populations were Saudi ever married females living in Riyadh city, KSA. Respondents were 305 ever married females responding to online communication. Self administered qu...

Artificial insemination (AI) is an efficient and cost-effective strategy to improve the genetics and reproductive performance of a herd. Reputable commercial AI stud and custom semen collection businesses, through stringent collection, processing and quality control, provide a highly fertile product to their customers. When semen is purchased and transferred to the producer’s liquid nitrogen re...

Several epidemiological and laboratory investigations have confirmed the traditional beliefs that lactation prolongs postpartum amenorrhea and provides some degree of protection against pregnancy even after the resumption of menstruation [ 12,2 11. The two crucial factors that determine the duration of this infertile period are the duration of unsupplemented lactation and the total duration of ...

An Arab horse breeder in the early 13th century carried out the first insemination reported, by trapping stallion semen in wool placed in the vagina of a mare and transferring this to the vagina of another mare (Heape, 1898). Later, in 1780, an Italian priest and physiologist named Lazzaro Spallanzani performed artificial insemination with dog semen, and revolutionised the way scientists though...

In spite of large improvements in health care technologies and more access to reproductive health services during past decades, there are many reports on human fertility decline .The role of life style and environmental factors on human fertility has attracted more attention recently and is the subject of worldwide studies on causes of male and female factor infertility. The important factors s...

OBJECTIVES There has been increased attention paid to cancer-related infertility and fertility preservation. However, how cancer patients decide whether or not to pursue fertility preservation has not been fully examined. METHODS The data come from 34 interviews with women in the USA diagnosed with breast cancer prior to 40 years of age who contemplated fertility preservation prior to ...

Exposure to drinking water containing as much as 500 ppm aluminum chloride for periods of 30, 60, and 90 days had no apparent effect on male reproductive processes. In an attempt to correlate enzyme activity with particular spermatogenic cell types, postnatal development of testicular enzymes was studied. Eight enzymes were selected: hyaluronidase (H), lactate dehydrogenase isoenzyme-X (LDH-X),...