Humans don't ever really look very pig like during development. There are early periods in development where pig and human embryos look similar but by the time human and pig fetuses have developed to the point of looking even somewhat like their future selves they in no way resemble each other.
The animal you are referring to is likely a butterfly, specifically the Peacock butterfly (Aglais io). They have long hindwing tails and distinctive eyespots that resemble those of a peacock, serving as a defense mechanism to deter predators.
increased social cooperation and communication among members of the community. It also likely contributed to the development of early forms of child-rearing practices and division of labor based on gender roles.
Scientists believe that jaws likely developed during the Silurian period, around 430 million years ago, from modifications of the anterior gill arches of early fish-like organisms. This evolutionary development allowed for more efficient feeding and predation, leading to the diversification and success of jawed vertebrates.
This would indicate that most likely the person or animal is demonstrating a visible asymmetry during walking as a result of pain.
An animal would develop a longer and thicker coat of hair or fur.
embryo
Childhood asthma
Childhood Asthma
The greatest amount of differentiation for organ formation in embryo development is most likely to occur during the gastrulation stage. This is when the three primary germ layers - ectoderm, mesoderm, and endoderm - form, leading to the development of various organs and tissues. Organs start to take shape and differentiate as cells become specified for their future roles during this critical stage.
During early stages of development, the human embryo may share some physical similarities with a pig fetus due to the overall vertebrate body plan. However, as development progresses, distinct human features begin to emerge, setting the human embryo and fetus apart from other species.
If teratogens are introduced during the germinal period of development (first two weeks after conception), it is most likely that the pregnancy will not continue, resulting in a miscarriage. This is because exposure to teratogens during this time can disrupt the normal development of the embryo and prevent it from implanting properly in the uterus.
Childhood asthma
Exposure to a harmful substance during the first trimester of pregnancy is most likely to damage many organs in a developing embryo since this is the period when organs are forming. Any disruption during this critical period can have long-lasting effects on the overall development of the fetus.
Genetic factors inherited from the parents are most likely to affect cell differentiation in a developing embryo. Mutations or alterations in specific genes can impact the development and specialization of cells, ultimately influencing how different tissues and organs form during embryonic growth.
More likely to stunt development.
A quick internet search using the phrase "photos of embryo development" yields a wealth of items from photos to illustrations. If more specific information about the embryonic development of a particular animal is of interest, adding that information to the search "photos of (horse) embryonic development" will yield more appropriate results. Keep in mind that the rate at which an embryo of each species develops can be significantly different (a 3 week old chicken "embryo" is ready to hatch and a human embryo still has it's heart on the outside of a somewhat shrimp shaped body) so added detail will be most likely to yield a better result.
It would likely result in developmental defects, leading to abnormal formation of organs in those specific parts of the embryo. This could affect the overall development and function of the organism.