nutritional effects on reproduction

Question 1

how does selenium effect female reproduction

Answer 1

• increased incidence of retained placenta
• increased incidence of cystic ovaries
• high embryonic mortality
• decreased conception rates
• increased incidence of endometritis
• birth of premature weak or dead calves

Question 2

list clinical signs of copper deficiency in reproducing females

Answer 2

• delay of puberty
• failure to display oestrus behaviour
• irregular oestrus, ultimately anoestrus
• reduced conception rates
• reduced peak ovulatory LH
• reduced feed intake and conversion efficiency
• hair pigmentation and texture issues
• reduced energy utilisation
• swayback
• not actually vcopper deficiency bu thomolybdate tox

Question 3

discuss effects of zinc of reproduction

Answer 3

male: DNA and protein replication, essential for spermatogenesis, deficiency gives decreased libido and testicular size

female: mild deficiency decreases numbers born, birth weight and leads to increased preg toxaemia, severe deficiency in early pregnancy leads to teratogenic effects

Question 4

symptoms of iodine deficiency in reproduction

Answer 4

• Vital role in thyroid function
• Probable reproductive influence
• Reproductive symptoms
• Lowered conception rates
• Irregular oestrus, anoestrus
• Retained placenta
• Abortions
• Still births, birth of weak and/or hairless calves
• Cystic ovaries
• In male decreased libido and semen quality
• stillbirths, birth of weak and/or hairless calves
• Last trimester effects
• Abnormal brain development (?reversible)
• Thyroid hormones produce lung surfactants
• decreased newborn viability
• Increased post-natal susceptibility to Hypothermia