A review of the amino acid metabolism in placental function response to fetal loss and low birth weight in pigs

Table 1 Summary of relevant reports on the effects of maternal dietary arginine supplementation on the reproductive performance in swine in the last decade

Supple-mentation period	Arginine content in basal diet, %	Supple-mental arginine, %	Litter size of live-born piglets	Litter weight of live-born piglets	Placental weight	References
d 14–25	0.70%	0.4%	↑by 2.2 per litter	–	↑by 34%	[110]
d 14–25	0.70%	0.8%	↑by 1.7 per litter	–	↑by 21%	[110]
d 14–28	1.07%	0.87%	↑by 3.7 per litter	↑by 32%	–	[111]
d 1–114	0.72%	0.25%	↑by 0.8 per litter	–	–	[112]
d 22–114	0.88%	0.83%	↑by 1.1 per litter	↑by 11%	↑by 16%	[113]
d 30–90 or d 30–114	0.73%	1%	↑by 1.6 per litter	↑	Un	[114]
d 30–110	0.61%	0.1%	↑by 1.1 per litter	–	–	[109]
d 70–110	0.72%	0.28%	↑by 1.2 per litter	–	–	[115]
d 70–110	0.72%	0.78%	↑by 1.1 per litter	↑by 12%	–	[115]
d 85–114	Un	1%	↑by 1.4 per litter	–	Un	[116]
d 90–114	Un	1%	–	↑by 16%	Un	[106]

ISSN: 2049-1891